70% of the pupils are boys. 50% of the boys and 60% of the girls wear hats. What percentage of the pupils do not wear hats?
| Boys |
Girls |
Total |
| 70% |
30% |
100% |
| Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
| 35% |
35% |
18% |
12% |
100% |
Number of boys who wear hats
= 50% x 70%
=
50100 x 70%
= 35%
Number of girls who wear hats
= 60% x 30%
=
60100 x 30%
= 18%
Percentage of pupils who wear hats
= 35% + 18%
= 53%
Percentage of pupils who do not wear hats
= 100% - 53%
= 47%
Answer: 47%
