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A statistics textbook chapter contains 63 exercises, 9 of which are essay questions. A student is assigned 13 problems. (a) What is the probability that

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A statistics textbook chapter contains 63 exercises, 9 of which are essay questions. A student is assigned 13 problems. (a) What is the probability that none of the questions are essay? (Round your answer to 4 decimal places.) Probability (b) What is the probability that at least one is essay? (Round your answer to 4 decimal places.) Probability (c) What is the probability that two or more are essay? (Round your answer to 4 decimal places.) Probability

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