Question
PSLE
The table shows the number of pupils with the following scores. A higher score means a better performance. Prizes were given to the top 21 pupils. Ahmad won a prize. What was the lowest he could have scored?

 Score  19  20  21 22  23  26 27 30
Pupils  3 14  15  11  7
2 m

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PSLE
The table shows the number of pupils with the following scores. A higher score means a better performance. Prizes were given to the top 21 pupils. Ahmad won a prize. What was the lowest he could have scored?

 Score  19  20  21 22  23  26 27 30
Pupils  3 14  15  11  7