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((n),(r)) = (""^(n)P(r))/(K), then K = ....

`((n),(r)) = (""^(n)P_(r))/(K),` then K = ......

A

`r !`

B

`(n-n) !`

C

`(n-n) ! R!`

D

`(r-1)!`

Text Solution

Verified by Experts

The correct Answer is:
A
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