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A multiple choice test has 10 questions each of which has 4 possible answers, only one...

A multiple choice test has 10 questions each of which has 4 possible answers, only one of which is correct. If Judy, who forgot to study for the test, guesses on all questions, what is the probability that she will answer exactly 3 questions correctly?

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Sample size, n=10 probability of a correct answer, p= = = 0.25 10-k The pmf of Binomial distribution is given by.. PCX = k) =

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