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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 = 3

B

r = 4

C

r = 6

D

r = 5

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • If ""^(n-1)C_r=(k^2-3)""^nC_(r+1) , then kin :

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    A
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    B
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    D
    5

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