combinatorics
/kəmˌbaɪnəˈtɔrɪks/
noun
- The branch of mathematics dealing with combinations, arrangements, and counting of objects.
- In combinatorics, we study how many different ways you can arrange a set of books on a shelf.
- The professor's research in combinatorics helps solve problems in computer science.
- Learning basic combinatorics can help you calculate the odds of winning a lottery.