70% of the students are girls. 60% of the girls and 80% of the boys wear spectacles. What percentage of the students do not wear spectacles?
Girls |
Boys |
Total |
70% |
30% |
100% |
Wear spectacles |
Do not wear |
Wear spectacles |
Do not wear |
|
42% |
28% |
24% |
6% |
100% |
Number of girls who wear spectacles
= 60% x 70%
=
60100 x 70%
= 42%
Number of boys who wear spectacles
= 80% x 30%
=
80100 x 30%
= 24%
Percentage of students who wear spectacles
= 42% + 24%
= 66%
Percentage of students who do not wear spectacles
= 100% - 66%
= 34%
Answer: 34%