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Find the probability that the student

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A student is going to take a 6 question multiple-choice test. Each question has FIVE choices for the answer, but only one of which is correct. The student forgot to study and plans to randomly guess each question. Let X be the number of correct answers the student gets.

(a) Find the probability that the student obtains at least 2 correct answers.

(b) Find the mean and variance of X.

Reference no: EM132386838

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