From the manhattan gmat practice exams:
9 Basketball players are trying out for a team, 5 are to be selected. If there are 6 guards and 3 forwards and only 3 guards and 2 forwards are to be chosen... How many different teams can be created?
Answer explains that 3 guards are to be selected from 6 multiplied by 2 forwards to be selected from 3. they solve it using combinatorics...
Why is that? Order does not matter in these cases does it? if you pick kid number 1 instead of kid number 2 with kid number 3... u still have 2 kids at the end of the count...