8mo

combinatorics-formula-1

You have 🍎, 🍌, 🍊, 🍐.
How many ways to choose 2 of them for fruit salad?

1 🍎🍌
2 🍎🍊
3 🍎🍐
4 🍌🍊
5 🍌🍐
6 🍊🍐