P(x) = nCx px qn-x
Probability of correct answer, p = 1/5 = 0.2
q = 1 - p = 0.8
n = Number of trials(questions) = 10
p(getting exactly 4 questions correct) = P(4)
= 10C4 x 0.24 x 0.86
= 0.0881
2. Suppose you take a multiple choice test with 10 questions, and each question has 5...
Suppose you forget to study for an exam. The exam is multiple choice and has one correct answer of 4 possible choices. Suppose that the exam contains 20 questions of which you guess on every one. a. What is the probability that you get exactly 10 questions correct by guessing? b. What is the probability that you get at most 1 question correct by guessing? c. What is the probability that you get at least 1 question correct by guessing?...
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A multiple choice test is given, in which each question has 5 possible answers. As part of an experiment in how students approach test-taking, the probabilities for getting answers correct just by guessing are calculated. If the test has 20 questions, what is the probability of getting 4 questions correct
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