40% of the students are boys. 50% of the boys and 70% of the girls wear hats. What percentage of the students do not wear hats?
| Boys |
Girls |
Total |
| 40% |
60% |
100% |
| Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
| 20% |
20% |
42% |
18% |
100% |
Number of boys who wear hats
= 50% x 40%
=
50100 x 40%
= 20%
Number of girls who wear hats
= 70% x 60%
=
70100 x 60%
= 42%
Percentage of students who wear hats
= 20% + 42%
= 62%
Percentage of students who do not wear hats
= 100% - 62%
= 38%
Answer: 38%
