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23-02-2018
Mathematics

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

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23-02-2018

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.

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