Combination

A combination is a selection of objects in which the order is not important. Combinations focus on the selected objects. For example, consider choosing two different ingredients for a salad from five unique options in a salad bar.

Because the order of the items does not matter, two combinations are different from each other if they do not have the same objects. The number of combinations can be found by listing every possible combination. However, this method is not helpful when considering a large number of objects. The Combination Formula should be used instead.