How many ways can a person select 3 videotapes from a collection of 10 tapes?

Question

Mathematics

Pierre Tate

1 September, 00:54

How many ways can a person select 3 videotapes from a collection of 10 tapes?

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Answers (1)

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Cason Schmidt · Answer 1

If the 10 videotapes are distinct (different) and the order of selection is immaterial, then there are

C (10,3) = 10! / (3! (10-3) !) = 10! / (3!7!) = 10*9*8 / (1*2*3) = 120

ways to select three videotapes out of 10.