The table shows the number of pupils with the following scores. A lower score means a better performance. Prizes were given to the top 3 pupils. Howard won a prize. What was the highest he could have scored?
Score | 17 | 20 | 21 | 23 | 26 | 29 | 30 |
Pupils | 1 | 2 | 2 | 10 | 6 | 4 | 3 |