If nC12 = nC8, then n is equal to

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Question:
If nC12 = nC8, then n is equal to
A. 20
B. 12
C. 6
D. 30

Solution:

A. 20

Explanation:

According to the question,

nC12 = nC8

We know that,

nCr
NCERT Exemplar Solutions For Class 11 Maths Chapter 7-28

n – 8 = 12

n = 20

Hence, Option (A) 20 is the correct answer.