50% of the students are girls. 40% of the girls and 60% of the boys wear glasses. What percentage of the students do not wear glasses?
Girls |
Boys |
Total |
50% |
50% |
100% |
Wear glasses |
Do not wear |
Wear glasses |
Do not wear |
|
20% |
30% |
30% |
20% |
100% |
Number of girls who wear glasses
= 40% x 50%
=
40100 x 50%
= 20%
Number of boys who wear glasses
= 60% x 50%
=
60100 x 50%
= 30%
Percentage of students who wear glasses
= 20% + 30%
= 50%
Percentage of students who do not wear glasses
= 100% - 50%
= 50%
Answer: 50%