60% of the students are boys. 50% of the boys and 70% of the girls wear spectacles. What percentage of the students do not wear spectacles?
Boys |
Girls |
Total |
60% |
40% |
100% |
Wear spectacles |
Do not wear |
Wear spectacles |
Do not wear |
|
30% |
30% |
28% |
12% |
100% |
Number of boys who wear spectacles
= 50% x 60%
=
50100 x 60%
= 30%
Number of girls who wear spectacles
= 70% x 40%
=
70100 x 40%
= 28%
Percentage of students who wear spectacles
= 30% + 28%
= 58%
Percentage of students who do not wear spectacles
= 100% - 58%
= 42%
Answer: 42%