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29 August, 11:46

What is the value of 7C2?

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  1. 29 August, 12:15
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    7!/2!

    Step-by-step explanation:

    nCr = (nr) = n! r! (n-r) ! 7C2 = (72) = 7!2! (7-2) !=7!2!⋅5!=50402⋅120=5040240=21.
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