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Find the correct statement:...

Find the correct statement:

A

`""^(n)P_(r)=(n!)/((n-r)!r!)`

B

The no. of ways of arranging n unlike objects is (n - 1)!

C

Factoral of a natural number n is the sum of first n natural numbers.

D

n! = n (n - 1)! for any integer `n ge 1`

Text Solution

Verified by Experts

The correct Answer is:
D
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