lulustar13
31.07.2019 •
Mathematics
How many ways can a person select 3 videotapes from a collection of 10 tapes?
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Ответ:
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.
Ответ: