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Mathematics, 04.07.2020 22:01 ItsLeyArt

A student takes a 10-question, multiple-choice exam with possible answers as a, b, c, and d for each question and guesses on each question.

(a) Find the probability of guessing 9 out of the 10 correctly. (10-pt)

(b) Find the mean (4-pt)

(c) Find the variance (4-pt)

(d) Find the standard deviation

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