20% 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 |
20% |
80% |
100% |
Wear watches |
Do not wear |
Wear watches |
Do not wear |
|
12% |
8% |
56% |
24% |
100% |
Number of boys who wear watches
= 60% x 20%
=
60100 x 20%
= 12%
Number of girls who wear watches
= 70% x 80%
=
70100 x 80%
= 56%
Percentage of students who wear watches
= 12% + 56%
= 68%
Percentage of students who do not wear watches
= 100% - 68%
= 32%
Answer: 32%