Question: A multiple choice test contains 25 questions, each with four answers. Assume a student just guesses on each question. (a) What is the probability that

A multiple choice test contains 25 questions, each with four answers. Assume a student just guesses on each question.
(a) What is the probability that the student answers more than 20 questions correctly?
(b) What is the probability the student answers less than 5 questions correctly?

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