# 4 Choose 3 Order Does Not Matter

To calculate four choose three where order does not matter, you can use the formula for n choose r combinations. For example if we want to calculate the possible combination of choosing three items from the set {♥︎,♦︎,♣︎,♠︎} we can set up the formula:

First we substitute four in for the variable to represent the size of the set. Then we substitute three for the variable to represent the number of items we are choosing.

To double check our work, we can display the four unique combination of these three items. Note, if order does matter, you can use the formula for permuations.

- { ♣︎, ♦︎, ♥︎ }
- { ♣︎, ♦︎, ♠︎ }
- { ♣︎, ♥︎, ♠︎ }
- { ♦︎, ♥︎, ♠︎ }