Question

Use the permutation formula below to find the number of outcomes when n = 5 and r = 2.

Answer 1

`nPr = (n!)/((n - r)!)`

`5P2 = (5!)/((5 - 2)!) = (5 * 4 * 3 * 2 * 1)/(3 * 2 * 1) = 20`