A student is taking a multiple-choice quiz in which each question has five choices. Assume that the student has no knowledge of the correct answers to any of the questions any hence, all her answer are guesses. The quiz has 10 multiple-choice questions. What is the probability that she will a) exactly three questions correct? b) at least one question correct? c) no more than two questions correct?

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A: It is given that n=250 and x=109.

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A: We have given that  Given thatp = 5% = 0.05n = 250

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