Tell whether the possibilities should be counted using a permutation or combination. Then find the number of possibilities.

Question

You have a carrying case that holds four CDs. You want to know in how many ways you can place four of the ten CDs you own into the case.

Answer: 10*9*8*7=5040 permutation...

Answer 1

For the number of combinations, you need to divide that by 4! = 24

There are that many ways of rearranging the same four CDs.

Answer 2

Thank you. Boy I was way off!!! I guess I over think things.