How many permutations exist of the letters p, q, r, s, and t, taking four at a time?
a: 120
b: 24
c: 5

The solution to the problem is as follows:

The formula for permutation would be:

P (n,r) = n! / (n-r) !

5*4*3*2 = 120

Therefore, there are 120 permutations exist of the letters p, q, r, s, and t, taking four at a time.

I hope my answer has come to your help. God bless and have a nice day ahead!

Hello there.

How many permutations exist of the letters p, q, r, s, and t, taking four at a time?

A: 120

21

step-by-step explanation:

21-4