IIl If "CB "C2 then find "C2 – InterviewSolution

1.

IIl If "CB "C2 then find "C2

Answer»

nCr = nC(n-r)

=> r = 8 and n-r = 2 => n = r+2 = 8+2 = 10

now, nC2 = 10C2 = 10*9/2*1 = 45

so thanks

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