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Mathematics, 13.03.2020 18:01 22nathanieltimms

You are to take a multiple-choice exam consisting of 64 questions with 2 possible responses to each question. Suppose that you have not studied and so must guess (select one of the two answers in a completely random fashion) on each question. Let x represent the number of correct responses on the test.
a. what kind of probability does x have?
b. What is your expected score on the exam?
c. Compare the variance and standard deviation of x.
d. based on your answers to parts b and c, is it likely that you would score over 50 on this exam?

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