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23 October, 11:21

An instructor gives her class a set of 10 problems with the information that the final exam will consist of a random selection of 5 of them. If a student has figured out how to do 7 of the problems, what is the probability that he or she will answer correctly (a) all 5 problems? (b) at least 4 of the problems?

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  1. 23 October, 11:46
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    Step-by-step explanation:

    (all 5 correctly) = (5 chosen among 7) / (5 chosen among 10)
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