Mathematics, 27.03.2020 17:27 AM28
A test consists of 20 problems and students are told to answer any 15 of these questions. In how many different ways can they choose the 15 questions?
15,504
20,145
23,670
25,890
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A test consists of 20 problems and students are told to answer any 15 of these questions. In how man...
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