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# Unit 8: Counting, permutations, and combinations

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## About this unit

How many outfits can you make from the shirts, pants, and socks in your closet? Address this question and more as you explore methods for counting how many possible outcomes there are in various situations. Learn about factorial, permutations, and combinations, and look at how to use these ideas to find probabilities.

### Learn

### Practice

- The counting principleGet 3 of 4 questions to level up!

### Learn

### Practice

- PermutationsGet 3 of 4 questions to level up!

### Learn

### Practice

- CombinationsGet 3 of 4 questions to level up!
- Permutations & combinationsGet 5 of 7 questions to level up!

### Learn

### Practice

- Probability with permutations and combinationsGet 3 of 4 questions to level up!

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