30% of the pupils are girls. 30% of the girls and 80% of the boys wear hats. What percentage of the pupils do not wear hats?
| Girls |
Boys |
Total |
| 30% |
70% |
100% |
| Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
| 9% |
21% |
56% |
14% |
100% |
Number of girls who wear hats
= 30% x 30%
=
30100 x 30%
= 9%
Number of boys who wear hats
= 80% x 70%
=
80100 x 70%
= 56%
Percentage of pupils who wear hats
= 9% + 56%
= 65%
Percentage of pupils who do not wear hats
= 100% - 65%
= 35%
Answer: 35%
