60% of the students are boys. 60% of the boys and 70% of the girls wear watches. What percentage of the students do not wear watches?
Boys |
Girls |
Total |
60% |
40% |
100% |
Wear watches |
Do not wear |
Wear watches |
Do not wear |
|
36% |
24% |
28% |
12% |
100% |
Number of boys who wear watches
= 60% x 60%
=
60100 x 60%
= 36%
Number of girls who wear watches
= 70% x 40%
=
70100 x 40%
= 28%
Percentage of students who wear watches
= 36% + 28%
= 64%
Percentage of students who do not wear watches
= 100% - 64%
= 36%
Answer: 36%