Problema Solution
Find the permutation of 5things taken 3 at a time.
Answer provided by our tutors
The number of permutations of n objects taken r at a time is determined by the following formula:
P(n,r)=n!(n−r)!
In our case:
n = 5
r = 3
P(5, 3) = 5!(5 - 3)!
P(5, 3) = 5!2!
P(5, 3) = 120*2
P(5, 3) = 240