Probability (Single Events)

You have a drawer full of mismatched socks.  There are 12 blue socks, 10 white socks, 9 pink socks, and 3 green socks.

1. If you pull out a sock at random, what is the probability of pulling a white sock?
2. If you put that sock back and pull out another sock, what is the probability of pulling a blue sock?
3. If you put that sock back and pull out another sock, what is the probability of pulling a green sock?
4. If you put that sock back, what is the probability of pulling a blue sock or a white sock?
5. If you put those socks back, what is the probability of pulling a pink sock or a green sock?
6. If you put those socks back, what is the probability of pulling a pink sock?
7. If you hold onto that pink sock, what is the probability of pulling another pink sock?
8. Let's say you pull those two pink socks and put them on.  When you want a spare pair.  What is the probability of pulling another pink sock?
9. And if you hold onto that sock, what is the probability of pulling one more pink sock?
10. Put all the socks back.  If you reach into the drawer, what is the probability of pulling out a blue, white, pink or green sock?