50% of the students are boys. 40% of the boys and 70% of the girls wear hats. What percentage of the students do not wear hats?
Boys |
Girls |
Total |
50% |
50% |
100% |
Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
20% |
30% |
35% |
15% |
100% |
Number of boys who wear hats
= 40% x 50%
=
40100 x 50%
= 20%
Number of girls who wear hats
= 70% x 50%
=
70100 x 50%
= 35%
Percentage of students who wear hats
= 20% + 35%
= 55%
Percentage of students who do not wear hats
= 100% - 55%
= 45%
Answer: 45%