The table shows the number of students with the following scores. A lower score means a better performance. Prizes were given to the top 3 students. John won a prize. What was the highest he could have scored?
Score | 14 | 15 | 18 | 19 | 22 | 24 | 25 |
Students | 1 | 2 | 2 | 7 | 7 | 3 | 1 |