Q.

If n is odd then the greatest coefficient occurs in the expansion of (x+y)n are

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a

nCn−12 nCn+12

b

nC2,nC1

c

n+1C2n+1C1

d

n+1C2n−1C2

answer is A.

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Detailed Solution

When n is odd, there are two middle terms having greatest binomial coefficients given by Cn-12   n,Cn+12   n
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