What will be the number of permutations of n objects taken all at a time, where p 1 objects are of first kind, p 2 objects are of second kind, ..... p k objects are of k th kind and rest, if any are all different?

Correct Answer is : n! /p1! p2!..... pk!

n! / p 1 n 1 ! P 2 ! n 2 .... p k n k !

AAI ATC Junior Executive 25 Mar 2021 Shift 1 Paper

Question : 78 of 120

Marks: +1, -0

What will be the number of permutations of n objects taken all at a time, where p₁ objects are of first kind, p₂ objects are of second kind, ..... p_k objects are of k^th kind and rest, if any are all different?

n! / p₁n₁! P₂! n₂.... p_k n_k!
n^k
n^r
n! /p₁! p₂!..... p_k!

Validate

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