Gujarati
6.Permutation and Combination
normal

$^n{P_r}{ \div ^n}{C_r}$ =

A

$n\,!$

B

$(n - r)!$

C

$\frac{1}{{r!}}$

D

$r\,!$

Solution

(d)On simplification you get required result.

Standard 11
Mathematics

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