Below is a table of participants by group and age category:
| 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 |
If a participant is selected at random, what is the probability that they are under 10 years old, given that they are not in Group C? (Express your answer as a decimal or fraction, not as a percent.)
