Exercise

page 88

  1. Four people are to be arranged in a row to have their picture taken. In how many ways can this be done?

Here,

We can use the formula n! to calculate this combination

Total ways the 4 people can be arranged = 4! = 4 * 3 * 2 * 1 = 24

Four people can be arranged in 24 different ways in a row to have their picture taken.