I'm sorry if this is in the wrong sub-forum. I'm guessing this could be classified as pretty basic stat. But here's the problem:
"From a group of 6 juniors and 8 seniors on the student council, 2 juniors and 4 seniors will be chosen to make up a 6-person committee. How many different 6-person committees are possible?
Then it tells me:
"Choice (c) is the correct answer. The 2 juniors on the committee can be chosen from the 6 juniors in (6/2) = 15 ways. The 4 seniors on the committee can be chosen from the 8 seniors in (8/4) = 70 ways. Therefore there are (15)(70) = 1050 possibilities for the 6 person committee."
I'm pretty bad at these.. Can someone please explain (6/2) = 15 and (8/4) = 70 deal to me? Or maybe just show me a clearer way of doing this? Thanks!