Question

What is the main difference between a situation in which the use of the permutations rule is appropriate and one in which the use of the combinations rule is appropriate?

Answer 1

Explanation:

A combination rule is used to determined the correct number of permutations while a permutation rule is an ordered combination.

A combination is a selection of all or part of a set of objects, without regard to the order in which they were selected. While permutation state that anything permute itself is equivalent to itself. Example (3)3=3!