This is probably a simple combinatorics question.
- We do have red balls, green balls and yellow balls ( is their count, so they are totall in count). If we combine them together into -pairs how many are their unique combinations?
I tried for the combination into -pairs and i solved it for special cases (example ).
However if i try to generalize it, I fail. I know that I am confused and this is probably wrong proccess to the problem.
Thank you all for your time.