If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Unit: Counting, permutations, and combinations

0

Possible mastery points
Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 500 Mastery points!

About this unit

This unit covers methods for counting how many possible outcomes there are in various situations. We'll learn about factorial, permutations, and combinations. We'll also look at how to use these ideas to find probabilities.