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If nC8 = nC12 find nC5

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If nC8 = nC12 find nC5

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nC8 = nC12

⇒ nC8 = nCn-12 (\(\because\) nCr = nCn-r)

⇒ 8 = n - 12 (By comparing)

⇒ n = 8 + 12 = 20

\(\therefore\) nC5 = 20C5 

= \(\frac{20.19.18.17.16}{5.4.3.2.1}\) = 15504

+2 votes
by (53.2k points)

Given nC8 = nC12 

⇒ n = 8 + 12 = 20 

nC5 = 20C5 = 15,504.

by (35 points)
Bro plz explain nC5=20C5 = 15504
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