What is the domain of this function?
-1
3
5
->
->
->
2
6
8

1

36

Explanation:

There is a  

1 /6 probability of getting a  2  on the first roll and a  1 /6  probability of getting a  4  on the second roll.  Since they (rolling a  2  first and rolling a  

4 second) are independent events (their probabilities don't affect each other), multiply their individual probabilities to get the probability of both events occurring: