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12-07-2017
Mathematics

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Professor Dupré Calc gives her class 20 study questions, from which she will select 8 to be on the final exam. How many ways can she select the questions?

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mreijepatmat mreijepatmat

12-07-2017

Since order doesn't matter, then it's a combination of 8 chosen among 20:

20C₈ = (20!)/(20-8)!(8!) = 125,970 ways

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