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X 15 25 10 12 P(X) 0.3 0.4 0.2 0.1 Mean = Variance = Standard deviation = Problem # 9: A students takes a 5

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X 15 25 10 12 P(X) 0.3 0.4 0.2 0.1 Mean = Variance = Standard deviation = Problem # 9: A students takes a 5 - question, multiple-choice exam with four choices for each question and guesses on each question. Find the probability of guessing exactly 2 out of 5 correctly. (7 points)

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