31 May
2021
31 May
'21
4:56 a.m.
So if I am making n decisions, and exactly five of them are a specific decision, how many different total decision combinations result in that? I think that the answer is combinations, nCr, but I'm really confused around that. Combinations says, if I put n things in a bag, and try out all the ways of taking r of them out, and consider the same items in a different order to be the same .... Anyway I think it is permutations, not combinations ...