The probability of getting 1 question right is:
This because each question has 4 choices of which only one is correct.
1) The probability of getting at least 8 questions right of 10 questions is:
2) In this part we have to calculate the probability of getting 7 questions right out of 9 questions and 10th questions right. That will make the 10th question the 8th one right.
3) The probability of getting at least 8 questions right in 1 exam is calculated in part 1. Now the probability of getting at least 8 questions right in atmost 1 exam of 6 exams is:
4. An exam paper consists of ten multiple choice questions, each offering four choices of which...
4. A multiple-choice exam has 5 questions. Each question has 3 choices, one of which is the right answer. A student completes the exam by guessing. What is the probability that student gets 4 or more correct answers just by guessing?
A quiz consists of 6 multiple-choice questions. Each question has 4 possible answers. A student is unprepared, and he has no choice but to guess answers completely at random. He passes the quiz if he gets at least 3 questions correctly. What is the probability that he will pass?
Mary's Final Exam for Psychology has 10 True/False questions and 10 multiple choice questions with 4 choices for each answer. Assuming Mary randomly guesses on every question: **Write answers using 3 decimal places* a.) What's the probability that she gets at least 8 of the 10 true/false questions correct? b.) What's the probability that she gets at least 6 of the 10 multiple choice questions correct? c.) If the multiple choice questions had 5 choices for answers instead of 4,...
Question 1 5 pts A multiple choice exam has 85 questions on it (4 choices each question) What is the probability of getting 28 questions right on such an exam? Round your answer to four decimal places Question 2 5 pts A multiple choice exam has 94 questions on it (5 choices each question) What is the probability of getting 19 questions right on such an exam? Round your answer to four decimal places Question 3 5 pts Suppose Bobby...
Consider a multiple choice exam of 20 questions. Suppose each question has four choices and only one of them is correct. If a student is going to guess answers, what is the probability that he answers i.) all questions correctly? ii.)more than 10 questions correctly? iii.)more than 5 and less than 10 correctly? iv.) How many Questions do you expect him to answer correctly?
4. Suppose that the next quiz contains 5 multiple choice questions with four choices for each questiorn (a, b, c, d). Unfortunately Esther forgot to study and chooses to randomly guess the answers What is the probability that a. The only question she gets right is the fifth question? b. She earns a satisfactory grade (considered, for this case, as an 80% or greater)? c. She gets no question right?
Each question on a multiple-choice exam has five choices. One of the choices is the correct answer, worth 7 points, another choice is wrong but still carries partial credit of 4 points, and the other three choices are worth 0 points. If a student picks answers at random, what is the expected value of his or her score for a problem? points If the exam has 20 questions, what is his or her expected score? points
An exam consists of 64 independent multiple-choice questions. For each question, there are five choices, with only one being correct. Suppose a student randomly guesses the correct answer to each question. (a) What are the mean and standard deviation of the number of successful guesses? (b) Use the normal approximation to find the probability that the student will correctly guess at most 10 correct answers.
A multiple choice test consists of 10 questions each with four choices (a,b,c,d) for each question. If a student must get at least 7 correct to pass the test, what is the probability that a student could pass the exam simply by guessing? Find your answer to 4 decimal places.
Sam takes a multiple choice test with two questions and four possible answers to each (A, B, C, D), of which only one is correct. He didn’t study so doesn’t know the material at all. As a result, he randomly chooses his answer to each question.: a. Thinking of his two choices as the random outcomes of interest, what is the sample space? (2 marks) b. What is the probability that he will get at least one question correct? (2...