What is the standard deviation of the number of correct

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Reference no: EM131970518

A multiple choice exam has 5 possible answers (only one is correct) for each of the 10 questions.

(a) What is the probability that a student would get 7 or more correct answers just by guessing?

(b) What is the expected number of correct answers a student would get by random guessing?

(c) What is the standard deviation of the number of correct answers by random guessing?

Reference no: EM131970518

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