Here are the ages of 18 members of a local chess club.
| 12 | 15 | 18 | 14 | 21 | 25 |
| 23 | 20 | 31 | 36 | 33 | 30 |
| 42 | 45 | 19 | 28 | 22 | 17 |
Draw an ordered stem and leaf diagram to show this information.
Key:
A member is selected at random. Work out the probability that this member is older than 30.
