Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 4Contains Standard content
Permutations and Combinations
How many number plates can a state issue? In how many ways can a team of five be chosen from twelve players? Listing every case would take forever, so mathematicians count cleverly. In this chapter you learn the fundamental principle of counting, factorials, permutations when order matters and combinations when it does not. Python lists small cases so you can check every formula before you trust it.
4 courses
