Fun questions, but I am having problems setting up the problem. I believe I got (a) by using C(300, 10). (b), (c), and (d), I am confuse on how to begin or what to think about.

I know order does not matter. Should I treat these problems as unordered selection of objects and use C(n, r) = n! / r! (n - r)! ?

Consider a bag of jelly beans that has 100 red, 100 yellow, and 100 green jelly beans.

a) How many color combinations can you get by drawing 10 beans from the bag?

b) How many color sequences can you get by drawing 5 beans from the bag?

c) How many color combinations of 10 beans have exactly two yellow beans?

d) How many color combinations of 10 beans have at least two yellow beans?

No answers please, just some advice so that i can think about it and then do it myself. thanks!