It's been a while since I've done questions like this and my mind has gone blank. I'm completely stumped about how I would start off a question like this. I vaguely remember that theres some formula and something to do with factorials that helps solve this but not too sure.
"How many different possible combinations of 5 yellow balls and 6 red balls
can be selected from a box of 7 yellow balls and 8 red balls?
If anyone can point me in the right direction that would be great, I think I just need a slight refresher.
If in doubt, rem