ksanquist4772 ksanquist4772

17-07-2017
Mathematics

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A club has 12 members. In how many ways can we select four members to go on a trip?

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Аноним Аноним

17-07-2017

this is the number of combinations of 4 from 12

12C4 = 12!
----------
4! 8!

= 12*11*10*9 11*5*9 = 495
-------------- =
4*3*2*1

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