Given the table:
| 0-9 years | 10-19 years | 20+ years | Total | |
|---|---|---|---|---|
| Group A | 7 | 14 | 9 | 30 |
| Group B | 6 | 4 | 20 | 30 |
| Group C | 17 | 12 | 1 | 30 |
| Total | 30 | 30 | 30 | 90 |
A participant is chosen at random. What is the probability that the participant is in Group A or aged 0-9 years? (Express your answer as a decimal or fraction, not as a percent.)
