Question: an auditor randomly selects 3 finacila reports ( without replacement) from among 63 reports of which 16 contain errors. What is the probability that at

an auditor randomly selects 3 finacila reports ( without replacement) from among 63 reports of which 16 contain errors. What is the probability that at least one of the three reports contains errors?

on a multiple choice test with 15 question, each question has the four possible answers, one correct. For a student who answers every wueation with a random guess, what is the probability that he will answer exactly 3 questions correctly?

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