I'm having a little trouble understanding some of this.

This is an example from a practice test

7 – 8. A poker hand consists of 5 cards dealt from a deck of 52 distinct cards.

7. In how many ways a full house (3 of one type of card and 2 of another) be dealt?

a. 168

b. 432

c. 3744

d. 29,952

e. none of these

8. How many different hands contain exactly 3 aces?

a. 1128

b. 4512

c. 1682

d. 18,048

e. none of these

I have .. no idea how to approach this.

There are 13 types of cards. So your chances of drawing a full house almost seems like it would be

4*3*2 * 4*3

But that doesn't make much sense either... gahh!