16. A pair of dice is rolled. What is the probability of rolling a 7 or an 11?
We look at the probabilistic model for the experiment


2 
1/36 
3 
2/36 
4 
3/36 
5 
4/36 
6 
5/36 
7 
6/36 
8 
5/36 
9 
4/36 
10 
3/36 
11 
2/36 
12 
1/36 
We add up the probabilities for 7 and 11 and get