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