A company surveyed 1000 people on their age and the number ofjeans purchased annually. The results of the poll are shown in thetable.
| Jeans Purchased Annually | |
|---|
| 0 | 1 | 2 | 3 or More | Total |
|---|
| Under 12 | 0 | 64 | 79 | 57 | 200 |
|---|
| 12-18 | 10 | 69 | 76 | 65 | 220 |
|---|
| 19-25 | 21 | 69 | 114 | 56 | 260 |
|---|
| over 25 | 31 | 65 | 204 | 20 | 320 |
|---|
| Total | 62 | 267 | 473 | 198 | 1000 |
|---|
A person is selected at random. Compute the probability of thefollowing.
(a) The person is over 25 and purchases 3 or more pairs of jeansannually.
(b) The person is in the age group 12-18 and purchases at most 2pairs of jeans annually.
(c) The person is in the age group 19-25 or purchases no jeansannually.
(d) The person is older than 18 or purchases exactly 1 pair ofjeans annually.
