30% of the pupils are girls. 40% of the girls and 50% of the boys wear hats. What percentage of the pupils do not wear hats?
Girls |
Boys |
Total |
30% |
70% |
100% |
Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
12% |
18% |
35% |
35% |
100% |
Number of girls who wear hats
= 40% x 30%
=
40100 x 30%
= 12%
Number of boys who wear hats
= 50% x 70%
=
50100 x 70%
= 35%
Percentage of pupils who wear hats
= 12% + 35%
= 47%
Percentage of pupils who do not wear hats
= 100% - 47%
= 53%
Answer: 53%