Dividing the permutation count by yields the number of unordered groups because each specific set of items can be arranged in different orders. Since combinations ignore internal order, all permutations of a single group correspond to just one combination.
Conditions: The selection is without repetition.; The items are distinct.; We are converting from ordered selections (permutations) to unordered selections (combinations).
Dividing the permutation count by yields the number of unordered groups because each specific set of items can be arranged in different orders. Since combinations ignore internal order, all permutations of a single group correspond to just one combination.
Conditions: The selection is without repetition.; The items are distinct.; We are converting from ordered selections (permutations) to unordered selections (combinations).