List all the permutations of five obects m l n k and p taken

List all the permutations of five obects m, l, n, k, and p taken two at a time without repetition. What is 5P2?

Solution

Sol)

Number of   permutations of five obects m, l, n, k, and p taken two at a time without repetition is 5P2

5P₂= (5!) / (5-2)!

= 5! /3!

=20