Lesson: Counting Using Permutations
In this lesson, we will learn how to use permutations to solve counting problems.
Sample Question Videos
Worksheet: 25 Questions • 1 Video
A shopping centre has 6 doors that are both entrances and exits. Which of the following represents the number of ways you can enter and leave the shopping centre if you do NOT use the same door twice?
Let and , where . Which of the following represents the number of elements in ?
Find the solution set of .