A closet contains 7 shirts, 6 skirts, and 4 pairs of shoes. how many possible outfit combinations are there?

The number of possible outfits would be 168 outfits. YOu can mix and match up to 168 number of outfits from these set. This is an example of counting principle. In this principle, one event has n possibilities then a second independent variable have m outcomes. Then, the total possibilities would be n times m.