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16 October, 12:32

You are to take a multiple-choice exam consisting of 100 questions with 5 possible responses to each question. Suppose that you have not studied and so must guess (randomly select one of the five answers) on each question. Let x represent the number of correct responses on the test. What is your expected score on the exam?

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  1. 16 October, 15:12
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    20

    Step-by-step explanation:

    This is a binomial distribution

    n = 100; p = 1/5

    E (x) = np = (100) (1/5) = 20
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