If ""^(2n)C3:""^nC2=44:3 , then for whic...

If `""^(2n)C_3:""^nC_2=44:3` , then for which of the following values of r, the value of `""^nC_r` will be 15 ?

A

r=2

B

r=4

C

r=5

D

r=6

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The correct Answer is:

B

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