50% of the pupils are boys. 30% of the boys and 50% of the girls wear hats. What percentage of the pupils do not wear hats?
| Boys |
Girls |
Total |
| 50% |
50% |
100% |
| Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
| 15% |
35% |
25% |
25% |
100% |
Number of boys who wear hats
= 30% x 50%
=
30100 x 50%
= 15%
Number of girls who wear hats
= 50% x 50%
=
50100 x 50%
= 25%
Percentage of pupils who wear hats
= 15% + 25%
= 40%
Percentage of pupils who do not wear hats
= 100% - 40%
= 60%
Answer: 60%
