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

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`

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