If nC8=nC12 what is the value of n?

A. 5
B. 10
C. 15
D. 20

Solution of the Mcq:

n/ 12 ( n – 12 ) = n / 8 ( n – 8 )
12 = n – 8
n = 12 + 8 = 20
n = 20.

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