NC2= nC5 then n=?

nC2= nC5 then n=?

Ajmi Siraj

Aug. 2, 2017, 6:47 p.m.

Answers!

Davneet Singh

Aug. 3, 2017, 6:26 p.m.

Hello

If

ⁿC_r = ⁿC_m

Then

r = m

& r = n - m

So,

ⁿC₂ = ⁿC₅

Therefore,

2 = n - 5

2 + 5 = n

7 = n

n = 9

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Varshith Mathu

Aug. 2, 2017, 10:10 p.m.

5/2

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