90% of the pupils are boys. 40% of the boys and 60% of the girls wear scarves. What percentage of the pupils do not wear scarves?
| Boys |
Girls |
Total |
| 90% |
10% |
100% |
| Wear scarves |
Do not wear |
Wear scarves |
Do not wear |
|
| 36% |
54% |
6% |
4% |
100% |
Number of boys who wear scarves
= 40% x 90%
=
40100 x 90%
= 36%
Number of girls who wear scarves
= 60% x 10%
=
60100 x 10%
= 6%
Percentage of pupils who wear scarves
= 36% + 6%
= 42%
Percentage of pupils who do not wear scarves
= 100% - 42%
= 58%
Answer: 58%
