Binomial Probabilities Answers

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What is the probability that exactly 1 of the coupons reveals a discount of 50%?Round to 3 decimal places.

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A student takes a multiple-choice test with 8 questions on it, each of which have 4 choices. The student randomly guesses an answer to each question.What is the probability that the student gets exactly 4 questions correct?Round to 3 decimal places.

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