Mathematics, 28.02.2020 19:58, anna8352

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 (select one of the five 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? explain your reasoning behind your answer

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