20% of the pupils are girls. 40% of the girls and 50% of the boys wear caps. What percentage of the pupils do not wear caps?
Girls |
Boys |
Total |
20% |
80% |
100% |
Wear caps |
Do not wear |
Wear caps |
Do not wear |
|
8% |
12% |
40% |
40% |
100% |
Number of girls who wear caps
= 40% x 20%
=
40100 x 20%
= 8%
Number of boys who wear caps
= 50% x 80%
=
50100 x 80%
= 40%
Percentage of pupils who wear caps
= 8% + 40%
= 48%
Percentage of pupils who do not wear caps
= 100% - 48%
= 52%
Answer: 52%