Question 437125
 the final exam in a math course consists of 40 multiple-choise question. each question has 4 possible answers, and only 1 of them is correct. an unprepared student makes random guesses for all of the answers. find the mean and standard deviation for the number of correct anwers for such student.
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Binomial Problem with n=40 and p = 1/4
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mean = np = (1/4)(40) = 10
std = sqrt[npq] = sqrt[10*(3/4)] = 2.7386
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Cheers,
Stan H.