The table below summarizes results from a study of people who refused to answer survey questions. A Market researcher is interested in responses, especially from those between the ages of 22 and 39. Find the probability that a selected subject responds of is between the ages of 22 and 39.
| _ |
18-21 |
22-29 |
30-39 |
40-49 |
50-59 |
60_and_over |
| Responded |
74 |
256 |
246 |
137 |
139 |
203 |
| Refused |
11 |
20 |
33 |
26 |
35 |
57 |