40% of the pupils are girls. 30% of the girls and 70% of the boys wear scarves. What percentage of the pupils do not wear scarves?
| Girls |
Boys |
Total |
| 40% |
60% |
100% |
| Wear scarves |
Do not wear |
Wear scarves |
Do not wear |
|
| 12% |
28% |
42% |
18% |
100% |
Number of girls who wear scarves
= 30% x 40%
=
30100 x 40%
= 12%
Number of boys who wear scarves
= 70% x 60%
=
70100 x 60%
= 42%
Percentage of pupils who wear scarves
= 12% + 42%
= 54%
Percentage of pupils who do not wear scarves
= 100% - 54%
= 46%
Answer: 46%
