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If .^(n)P(r)=x.^(n)C(r) x=...

If `.^(n)P_(r)=x.^(n)C_(r)` x=

A

`.^(n)P_(r-1)`

B

`.^(n)C_(r-1)`

C

`n!`

D

`r!`

Text Solution

Verified by Experts

The correct Answer is:
D
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