20% of the pupils are boys. 50% of the boys and 70% of the girls wear hats. What percentage of the pupils do not wear hats?
| Boys |
Girls |
Total |
| 20% |
80% |
100% |
| Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
| 10% |
10% |
56% |
24% |
100% |
Number of boys who wear hats
= 50% x 20%
=
50100 x 20%
= 10%
Number of girls who wear hats
= 70% x 80%
=
70100 x 80%
= 56%
Percentage of pupils who wear hats
= 10% + 56%
= 66%
Percentage of pupils who do not wear hats
= 100% - 66%
= 34%
Answer: 34%
