Multiple Choice Probability Calculator


Learn more about the differences between permutations and combinations, or explore hundreds of other calculators covering topics such as finance, fitness, health, math, and more. Basic Probability 1. Monty says to you \Do you want to pick door 2?" Is it to your advantage to switch your choice of doors? Marilyn gave a solution concluding that you should switch, and if you do, your probability of. Korb University of Jos. Discussion. The TI-Nspire™ CX CAS graphing calculator provides algebraic capability to symbolically solve equations, factor and expand variable expressions, complete the square, find antiderivatives, computer limits and exact solutions in irrational forms, making it a robust hands-learning tool that satisfies. I am a college student who is slightly obsessed with working out the answers to problems like these. CSE 103: Probability and statistics Fall 2010 Topic 2 — Multiple events, conditioning, and independence, II 2. Use the “not” trick. CalcTool's unit menu allows you to enter the probability as a number, a ratio, or a percentage, as is convenient. MULTIPLE CHOICE. (Multiple Choice, 10 points) A manufacturer of matches randomly and independently puts 21 matches in each box of matches produced. Assume the cards are not replaced. Probability/Counting Multiple Choice Post-Test Multiple Choice Identify the choice that best completes the statement or answers the question. This fact allowed us to use binompdf for exact probabilities and binomcdf for probabilities that included multiple values. Probability should always lies between 0 and 1. PROBABILITY MULTIPLE CHOICE QUESTIONS ANSWER. The PDF is the density of probability rather than the probability mass. The Board of Studies serves 100,000 teachers and a million students in New South Wales, Australia. The problem was originally posed (and solved) in a letter by Steve Selvin to the American Statistician in 1975 ( Selvin 1975a ), ( Selvin 1975b ). Save time and energy. ? If the trial consists of ipping a coin twice, the. New York State Testing Program Grade 7 Common Core Mathematics Test Released Questions with Annotations With the adoption of the New York P-12 Common Core Learning Standards (CCLS) in ELA/Literacy and Mathematics, the Board of Regents signaled a shift in both instruction and assessment. (Decision of the Board of Governors of 6/12/2013). Multiple-event probability definition: Multiple Event probability is used to find the probability for multiple events that occurs for an experiment. A probability distribution is a table or an equation that links each outcome of a statistical experiment with its probability of occurrence. As you can see, there are six combinations of the three colors. – If you have a Likert scale or other types of items , use the Spearman-Brown formula. The Monty Hall problem is a brain teaser, in the form of a probability puzzle, loosely based on the American television game show Let's Make a Deal and named after its original host, Monty Hall. Missed some things?. Multiple-choice questions. This also assumes that the risk of students not saving or accidentally deleting the file is negligible. MULTIPLE CHOICE. So there is a 74. The answer is E. Session 1, Multiple-Choice Questions Mathematics, Grade 8 Reporting Categoryfor Item 1: Number Sense and Operations(p. When you get your score, you will be shown the correct answers. Based on these weaknesses the authors concluded that no satisfactory method exists for proving cheating through statistical analyses. Combination b. In the calculator section of the new SAT Mathematics test, you get 55 minutes to tackle 37 questions. 40 on a four choice test should be considered for deletion. 70% for an n question multiple choice test with 3 options?. A multiple-choice question on an economics quiz contains 10 questions with five possible answers each. This web site owner is mathematician Miloš Petrović. With 24 students guessing, the probability that NONE will get a B or better is (121/128)^24 = 25. We're working with educators and institutions to improve results for students everywhere. Monty says to you \Do you want to pick door 2?" Is it to your advantage to switch your choice of doors? Marilyn gave a solution concluding that you should switch, and if you do, your probability of. performance on one quiz has no bearing on the other quiz). Navy/Flickr Ideally, multiple-choice exams would be random, without patterns of right or wrong answers. 7 The probabilities that three different archers, A, B hit the mark, independently of one an-other, are respectively 1/6, 1/4 and 1/3. Compare the probability value to the significance level and make the statistical decision 21. Read Business Statistics MCQs: Multiple Choice Questions and Answers (Quiz & Tests with Answer Keys) by Arshad Iqbal for free with a 30 day free trial. To calculate mean, you simple add up all the values of data given and divide by the number data provided. If a student guesses randomly, find the probability of each of the following events: 1. 08 - $5000 $150. Multiple Choice: Disney wants to survey 200 guest who attend Disneyland on New Year's Day on what they thought of the fireworks. You may use a calculator, and notes on three sides of a standard 8. Basic Probability Concepts. What is distribution of values taken by a statistic in all possible samples of the same size from the same population called? (a) the probability that the statistic is obtained. What is the probability of x successes in n independent trials in a binomial. Calculate the probability that a randomly chosen member of this group visits a X3 be a random sample from a discrete. We know that (on average) neighbors answer 50% of all questions jointly correct. Multiple-choice tests (MCTs) have long been a source of countless—and heated—debates. 1) In one town, 31% of all voters are Democrats. Compare the probability value to the significance level and make the statistical decision 21. Multiple-Choice Questions. Example Find the mean of 8, 5, 7. If a student is simply guessing at the answers a. You pick a door, say 1, Monty opens another door, say 3, which has a goat. I hope that the topic will be useful in its own right, as well as giving a flavour of the book. MULTIPLE CHOICE QUESTIONS (50%) All answers must be written on the answer sheet; write answers to five questions in each row, for example: 1. Quiz 1 has 5 problems where each of the problem has 4 choices. Assignments DUE Wednesday 11/13/13: Calculate conditional distribution percentages for your GRASPS. what is the probability of answering a show more Imagine that you are taking a multiple choice test, 4 possible answer are given for each question. Multiple choice is the same format as for the midterm. Each question hasfive answers, of which only one is correct. Have you ever taken a test and discovered you have no choice but to guess on a couple of problems? In this example problem, we are considering the probability of two independent events occurring. ? If the trial consists of ipping a coin twice, the. Each multiple choice correct response is worth 3 points. Each question has 4 answer choices, of which 1 is correct answer and the other 3 are incorrect. Algebra -> Probability-and-statistics-> SOLUTION: There is a 100 question multiple choice test each with 5 choices. In how many ways can a president and vice president be selected from a club of 20 students? Show all work! A) 20 B) 39 C) 40 D) 380. If the experiment can be repeated potentially infinitely many times, then the probability of an event can be defined through relative frequencies. a probability of 1/4 means one chance out of four, or 25%. Discussion. The TI-Nspire™ CAS graphing calculator provides algebraic capability to symbolically solve equations, factor and expand variable expressions, complete the square, find antiderivatives, and compute limits and exact solutions in irrational forms, making it a robust hands-on learning tool that. We proceed with the above example. New York State Testing Program Grade 7 Common Core Mathematics Test Released Questions with Annotations With the adoption of the New York P-12 Common Core Learning Standards (CCLS) in ELA/Literacy and Mathematics, the Board of Regents signaled a shift in both instruction and assessment. I am a college student who is slightly obsessed with working out the answers to problems like these. How to solve Aptitude Probability problems? You can easily solve all kind of Aptitude questions based on Probability by practicing the objective type exercises given below, also get shortcut methods to solve Aptitude Probability problems. Multiple choice test items have several potential advantages: Versatility: Multiple choice test items can be written to assess various levels of learning outcomes, from basic recall to application, analysis, and evaluation. These examples include flipping coins, drawing cards from a deck, guessing on a multiple choice test, selecting jellybeans from a bag, and choosing people for a committee, etc. Compute the probability/odds of selecting the first five numbers and add to it the probability/odds of selecting the Bonus Ball number. Quotient and Remainder Calculator. The probability of answering a 4 option multiple choice question by picking an answer randomly is 25%, but since we know that the answer is also D. If we use a simple random sample of 25 students, which of the following statements is correct: The sampling distribution is small relative to the population. 1 1) The interpretation of the slope coefficient in the model ln( ) ln YX ii =β 01 ++β ( ) u. If you write 50% below the answers on the test paper, you would be marked wrong. Solutions to Review Multiple Choice No hamsters were harmed in any way as a result of Math 317. You are feeling lucky and hence don't read the questions. You’ll be pretty well set for Test Day if you remember what probability is (desired/total), how to calculate multiple probabilities (multiply them), and the shortcut for solving difficult probability problems (subtract undesired from 1). Calculating the probability of fifty consecutive rolls of 7 a la the short story "The Barnhouse Effect" by Kurt Vonnegut. Multiple-choice exams are frequently used as an efficient and objective method Now, let A denote the set of questions that student c. The study of probability began in 17th-century France where two of the great French mathematicians Blaise Pascal (1623–1662) and Pierre de Fermat (1601–1665) corresponded about problems from games of chance. With the probability calculator you can investigate the relationships of likelihood between two separate events. question˜1, which is a multiple choice question with 5 possible answer choices. Several of you asked for multiple choice practice, and I know that probability tends to be a difficult chapter for many, so I decided to make a multiple choice review complete with answers to help you in this chapter. They may not resemble the questions that your instructor may ask on a test. Save time and energy. The probability of landing on blue is one fourth. The AP Statistics Exam consists of two sections: Multiple Choice and Free Response. Find the indicated probability. 0 points for each question left blank. Here is a simple probability model for multiple-choice tests. Also, calculate the probability of circuit working if e5 is not operational; next use the formula of total probability. The application of. Time --- 1 hour and 30 minutes. The probability that the selected ticket has a number which is a multiple of 5 is. Multiple Choice Questions forReview is used to calculate the probability of exactly 2 misprints on page 16, which of the curve should be used to get the area. The probability of guessing the correct answer to a multiple choice question when there are 5 choices is 1 in 5, or 20%, or 0. The probability of an event is given by - The Number Of Ways Event A Can Occur The total number Of Possible Outcomes. A flood-ravaged road, once traveled by visitors to Coralville Lake, ends abruptly in a series of bedrock ledges that take visitors on an unexpected journey into Iowa's geologic past (). The measure of location which is the most likely to be influenced by extreme values in the data set is the a. If each question has four choices and you guess on each question, what is the probability of getting exactly 7 questions correct? n = 10 k = 7 n - k = 3. This will give you the probability of multiple events occurring one after another. choice, but each element can have a different chance of being selected. 1 Basic De nitions Trials? Probability is concerned with the outcome of tri-als. Setup: We consider a multiple choice test with 30 questions, each consisting of four potential answers. a) Find the probability. Which of the following represents a subjective probability? A. Social Studies. Find the probability that the elements chosen are in A. 4 MULTIPLE CHOICE. The probability of one event occurring is quantified as a number between 0 and 1, with 1 representing certainty, and 0 representing that the event cannot happen. Korb University of Jos. Assuming picking the winner in each of the 3 races is an event independent of the others, then the probability of picking all 3 winners is (1/11)*(1/11)*(1/11) = 1/1331. Similarly, in the final exam we were allowed to have an 8. The student gets 5 correct 2. This free probability calculator can calculate the probability of two events, as well as that of a normal distribution. Each trial is assumed to have only two outcomes, either success or failure. The question styles found in this section are multiple choice (40 questions) and gridded response (12 questions). choices can be any iterable containing iterables with two items each. Statistical Quality Control Multiple choices: 1. Probability Laws to a Safety Instrumented. Choose the one alternative that best completes the statement or answers the question. Learn more about the differences between permutations and combinations, or explore hundreds of other calculators covering topics such as finance, fitness, health, math, and more. 5 GUESSING ON A MULTIPLE-CHOICE QUIZ Suppose that Erin guesses on each question of a multiple-choice quiz with four different choices. Explore the combined power of descriptive statistics with challenging AP® Statistics probability questions. Assignments DUE Wednesday 11/13/13: Calculate conditional distribution percentages for your GRASPS. If the test was A-D multiple choice (4 possible answers), and correct answers are evenly and randomly distributed through all possibilities, then picking D every time would net you a 25%. These printable math worksheets will help students learn about probability of random events. Please enter the necessary parameter values, and then click 'Calculate'. Make sure that you know how to use your calculator effectively. Step 3: Practice Multiple-Choice Questions. The suggested testing times for the Grade 7 iLEAP Math test listed in Table 2. 5″ x 11″ handwritten cheat sheet and a scientific calculator. The rst idea that might come to mind is to test each hypothesis separately, using some level of signi cance. 05, what is the. Below is a quick tutorial followed by practice questions. 5 correct answers. The PDF is the density of probability rather than the probability mass. And since It showed up on my GRE , I can't recollect the answer choices correctly. Concepts questions b. This calculator conducts a Z-test for two population proportions p1 and p2. The higher the probability of an event, the more likely it is to occur, i. Nothing is certain in this quiz. Enter your values in the form and click the "Calculate" button to see the results. Find the probability of guessing an incorrect answer. Consider the coin flip experiment described above. 5-by-11-inch (or A4) sheet of paper which you have written by hand, yourself. Both sampling and nonsampling risks are associated with: Easy d Tests of controls. -Multiple choices: "Travel to work in rush hour,"and "travel to work out of rush hour,"as well as the choice of bus or car. Read Business Statistics MCQs: Multiple Choice Questions and Answers (Quiz & Tests with Answer Keys) by Arshad Iqbal for free with a 30 day free trial. Each trial is assumed to have only two outcomes, either success or failure. But what are the two possible values of X? 2. The score on each section is converted to a 15 point scale so that your total score has a maximum value of 45. Assume the cards are not replaced. choice (each element in the list has a different probability for being selected). To finish the example, you would divide five by 36 to find the probability to be 0. It is mainly concerned with the amount of time until some specific event occurs. Let's say there are 5 multiple choice questions, with the answers A, B or C. What is the probability of getting all 20 questions correctly?. On a 50 question multiple choice exam with 5 choices per questions, What are the odds that I get 100% if I. To calculate mean, you simple add up all the values of data given and divide by the number data provided. When the exam questions are of True/False type, the chances of guessing correctly are 1 out of 2, or 50%. Unformatted text preview: Chapter 07 Continuous Probability Distributions Multiple Choice Questions 16. Assume that 7 questions are answered by guessing randomly. If a student guesses at the answer, what is the probability that he or she selects the correct answer. 4 MULTIPLE CHOICE. Of the other students who missed those 7 questions, did the other students answer them in the same incorrect way? For probability analysis, you generally assume that each wrong answer is equally likely, but on multiple choice tests there are often some wrong answers that are closer to the right answer than others. Each question has exactly one correct answer of the four alternatives given. Time --- 1 hour and 30 minutes. Section II Free-Response Questions. probability Probability of multiple-choice answers in questions. data must be between what two values? _____ 17. 50 MC D 004 Probability, Statistics, Patterns, Functions, and Algebra Items 1 through 7 are in the non-calculator section of the test. Basics of Probability Given independent events A and B Probability of A and B = Prob (A) x Prob (B) Probability of A or B = Prob (A) + Prob (B) For outcomes x 1, x 2,. D) The probability of rain would have matched the actual results if it had rained on Wednesday. Bubble the response that best answers the question. 25, otherwise all 4 choices seem equally plausible. Flood Prediction. Mixed Probability Word Problems Worksheet 1 - What is the chance of randomly choosing a dress, lotto choices, and numbers. 35, then the probability of “not X” is 0. View a potential strategy's return on investment against future stock price AND over time. c)less than two answer correctly. What's the likelihood Joanna will find a half-dollar if she pulls just one coin out of her pocket?. A multiple choice exam has 4 choices for each question. This is a practice test for the multiple-choice section of the Advanced Placement Statistics Exam. Each question has four possible answers, only one of which is correct. Setup: We consider a multiple choice test with 30 questions, each consisting of four potential answers. The student gets 5 correct 2. The percentage at the end of each answer is the percentage of people with that response. The laws of probability are essential for understanding genetics, opinion polls, pricing stock options, setting odds in horseracing and games of chance, and many other fields. That is, the questions on your class exams may be more difficult and may include essay and short answer questions. Share a Story about your experiences with Math which could inspire or help others. ? Trials are also called experiments or observa-tions (multiple trials). Multiple Choice: 1. Posterior probability of an event is the probability of an event after collecting some empirical data. I need at least 3 correct answers to pass the test. The TI-Nspire™ CX CAS graphing calculator provides algebraic capability to symbolically solve equations, factor and expand variable expressions, complete the square, find antiderivatives, computer limits and exact solutions in irrational forms, making it a robust hands-learning tool that satisfies. The Probability Exam is a three-hour exam that consists of 30 multiple-choice questions and is administered as a computer-based test (CBT). Then we can apply the appropriate Addition Rule: Addition Rule 1: When two events, A and B, are mutually exclusive, the probability that A or B will occur is the sum of the probability of each event. The probability of a low ability examinee passing a reasonably long criterion-referenced MC test by guessing alone is demonstrably low. A quiz consists of 10 multiple-choice questions, each with 4 possible answers. The test is a three-hour examination based on material usually covered in undergraduate mathematics courses in math-ematical probability and statistics. In addition, schools should make every effort to. This exam is composed of 25 multiple choice questions each worth 4 points. (b) the population parameter. The probability of a low ability examinee passing a reasonably long criterion-referenced MC test by guessing alone is demonstrably low. 08 - $5000 $150. You pick a door, say 1, Monty opens another door, say 3, which has a goat. Calculate the lowest common multiple of two positive integers. This also assumes that the risk of students not saving or accidentally deleting the file is negligible. 2010 Mathematics Tests Standard and Performance Indicator Map with Answer Key Grade 7 (continued) Question Type Points Strand Content Performance Indicator Answer Key Book 1 (continued) 16 Multiple Choice 1 Statistics and Probability 6. Since you can't select both, the answer is either B (if either A or D are correct) or C (if you actually have to pick both answers at the same time to get the question right, which is against the. b) at least to answer correctly. 98 in the case that the tested individual uses the drug) and 90% accurate in the case of a non-user of the drig (e. 3% of respondents gave that answer to this multiple choice question #3 in this interesting study. Practice Multiple Choice for Chapter 7 1. Multiple Choice (MC) or Technology-Enhanced 30 MC C 003 Probability, Statistics, Patterns, Items 8 through 50 are in the calculator section of the test. Given below are the Class 10 Maths Important Questions for Probability a. Question 2 Find the probability the student gets more than 7 questions correct. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 50 %. Preview this quiz on Quizizz. Improve your math knowledge with free questions in "Find the probability" and thousands of other math skills. If probability of X is 0. There are 10 members on a committee. probability of the second event. The probability he finds File A on the first try is 0. Worksheets labeled with are accessible to Help Teaching Pro subscribers only. A coin has a probability of 0. 1 The Monty Hall problem This probability puzzle is weakly related to a game on an old TV show called Let's Make a Deal, and has been renamed after the host of that show. c)less than two answer correctly. Interquartile range 7. a Construct a probability distribution table for X. PROBABILITY MULTIPLE CHOICE QUESTIONS ANSWER. In Calculus I we moved on to the subject of integrals once we had finished the discussion of derivatives. the multiple choice questions for the MLC exam in 2014 and later were intended to average five minutes each. It depends on how the teacher distributed the right answers. We know that (on average) neighbors answer 50% of all questions jointly correct. Calculation problems c. STATISTICS AND PROBABILITY 131 (B) Multiple Choice Questions Write the correct answer in each of the following : Sample Question 1: The marks obtained by 17 students in a mathematics test (out of. Two events each have probability 0. You are taking a 10 question multiple choice test. you are to circle the correct answer. 5 correct answers. So rst, imagine. 0625 probability of no girls, a. Each question has four possible choices. Probability and Statistics Quizzes. Interquartile range 7. However!!!!! In every multiple choice test I've ever taken, there have always been better and worse distractor answers. Suppose that you take a 20 question multiple-choice quiz by guessing. Preview Print Answers. The shape of any uniform probability distribution is _____. If 70% of the trucks weigh more than 12,000 pounds and 80% weigh more than 10,000. d) every unit of the population has an equal chance of being selected. Missed some things?. is as follows: a) a 1% change in X is associated with a β. Learn more about different types of probabilities, or explore hundreds of other calculators covering the topics of math, finance, fitness, and health, among others. In a study of the Hopi, a Native American tribe of central Arizona, Woolf and Dukepoo (1959) found 26 albino individuals in a total population of 6000. b) at least to answer correctly. Is it "significant" to answer a question correctly if a random guess is made? Consider an event to be "significant" if its probability is less than or equal to 0. Discrete Probability Distribution Exam Questions Discrete Probability Distributions: Help and Review Chapter Exam Choose your answers to the questions and click 'Next' to see the next set of questions. We reviewed using AP multiple choice test-prep flashcards and old AP exam FRQs. Algebra -> Probability-and-statistics-> SOLUTION: There is a 100 question multiple choice test each with 5 choices. These printable math worksheets will help students learn about probability of random events. Item is still being reviewed Multiple Choice JOINTDISTRIBUTIO CONTINGENCYTABLE PROBDISTRIBUTION PROBABILITY CHISQUARE NONPARAMETRIC STATISTICS T= 2 Computation D= 3 Biological Sciences General Back to review this question. What is the probability that a matchbox from th is manufacturer will contain one or. Tool to compute roundings (integers, decimals, to multiple). There are 10 members on a committee. In each portion, no-calculator and calculator, you'll first. Topic: Binomial Distributions Activities: Multiple Choice Exams Example 1: Multiple Choice Exam Suppose that a student takes a pop quiz with three multiple choice options on each question. STATISTICS AND PROBABILITY 131 (B) Multiple Choice Questions Write the correct answer in each of the following : Sample Question 1: The marks obtained by 17 students in a mathematics test (out of. Section I is the multiple-choice portion of the exam. Improve your math knowledge with free questions in "Find the probability" and thousands of other math skills. Find the probability that the student guesses more than 75% of the. What is the sum of the probabilities in a uniform probability distribution? a. In the example you gave, I find it much easier to start by calculating the probability of NOT rolling a 5 across multilple throws, because these probabilities can be just multiplied together. What is the probability of x successes in n independent trials in a binomial. Find the probability of getting a king and then an eight. If we use a simple random sample of 25 students, which of the following statements is correct: The sampling distribution is small relative to the population. You are taking a multiple choice quiz that consist in 3 questions, each question has 3 possible answers only one is correct. The higher the probability of an event, the more likely it is to occur, i. How to solve Aptitude Probability problems? You can easily solve all kind of Aptitude questions based on Probability by practicing the objective type exercises given below, also get shortcut methods to solve Aptitude Probability problems. Social Studies. Below is a quick tutorial followed by practice questions. Statistics: Five Probability multiple choice questions Multiple choice questions on probability Multiple choice questions on Probability & Hypothesis Multiple choice questions on probability Multiple choice questions in statistics Multiple Choice Questions Multiple choice questions on probability 21 prob/stats multiple choice questions required. I hope that the topic will be useful in its own right, as well as giving a flavour of the book. In this mathematical definition of probability can extend to infinite sample spaces, and even uncountable sample spaces, using the concept of a measure. We reviewed using AP multiple choice test-prep flashcards and old AP exam FRQs. Express the indicated degree of likelihood as a probability value. This is the same as saying the probability that the person picks the winner is 1/(10+1) = 1/11. Given below are the Class 9 Maths Important Questions for Probability a. Since there are six multiple choice questions, his odds of missing them all are (4/5)^6. Generalising the law of large numbers away from finite. Assuming picking the winner in each of the 3 races is an event independent of the others, then the probability of picking all 3 winners is (1/11)*(1/11)*(1/11) = 1/1331. Probability is a measure of the likelihood that an event will occur. A student writes a five question multiple-choice quiz. Multiple-choice tests. Compare the probability value to the significance level and make the statistical decision 21. I designed this web site and wrote all the lessons, formulas and calculators. And since It showed up on my GRE , I can't recollect the answer choices correctly. The Probability Calculator computes the probability of one event, based on probabilities of other events. 00887 MULTIPLE CHOICE PRACTICE 1. The TI-Nspire™ CX CAS graphing calculator provides algebraic capability to symbolically solve equations, factor and expand variable expressions, complete the square, find antiderivatives, computer limits and exact solutions in irrational forms, making it a robust hands-learning tool that satisfies. Probability Spinners (Basic) FREE Use the pictures of the spinners to determine the probability of outcomes for events. Multiple Choice Questions forReview is used to calculate the probability of exactly 2 misprints on page 16, which of the curve should be used to get the area. It is hoped that the finding of this paper will be useful for practitioners in various fields. This is the same as saying the probability that the person picks the winner is 1/(10+1) = 1/11. In this mathematical definition of probability can extend to infinite sample spaces, and even uncountable sample spaces, using the concept of a measure. However!!!!! In every multiple choice test I've ever taken, there have always been better and worse distractor answers. The model states that the expected value of Y--in this case, the expected merit pay increase--equals β0 plus β1 times X. Facts, Fiction and Probability Mathematics. These printable math worksheets will help students learn about probability of random events. Graphing calculator expected Section I: Multiple Choice Booklet Instructions Section II: Free Response Booklet Instructions Section I of this exam contains 40 multiple-choice questions. The probability of rolling a 2 on a single die is one in six. Become a Subscriber to access all standards aligned worksheets. Answers: 1) 43/84 + 16/84 – 9/84 = 50/84. To complete the quiz you randomly guess the answer to each question. Assess student understanding of arithmetic, algebra, and geometry concepts with these math worksheets for K-12 students. You randomly guess each question. If they know the answer they will get the question right. Calculating the probability of fifty consecutive rolls of 7 a la the short story "The Barnhouse Effect" by Kurt Vonnegut.