Permutations are order driven.
Combinations are content driven
Suppose there is a group of twenty people.
If we select a president, vice president, and a secretary, how many ways can that be done?
If we select a subgroup of three members to plan the annual picnic, how many ways can that be done?
Now one of those to situations has to do with order? Permutation
Which has to do with content alone? Combination