Question: 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

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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