70% of the pupils are girls. 30% of the girls and 80% of the boys wear caps. What percentage of the pupils do not wear caps?
Girls |
Boys |
Total |
70% |
30% |
100% |
Wear caps |
Do not wear |
Wear caps |
Do not wear |
|
21% |
49% |
24% |
6% |
100% |
Number of girls who wear caps
= 30% x 70%
=
30100 x 70%
= 21%
Number of boys who wear caps
= 80% x 30%
=
80100 x 30%
= 24%
Percentage of pupils who wear caps
= 21% + 24%
= 45%
Percentage of pupils who do not wear caps
= 100% - 45%
= 55%
Answer: 55%