20% of the pupils are girls. 30% of the girls and 50% of the boys wear scarves. What percentage of the pupils do not wear scarves?
| Girls |
Boys |
Total |
| 20% |
80% |
100% |
| Wear scarves |
Do not wear |
Wear scarves |
Do not wear |
|
| 6% |
14% |
40% |
40% |
100% |
Number of girls who wear scarves
= 30% x 20%
=
30100 x 20%
= 6%
Number of boys who wear scarves
= 50% x 80%
=
50100 x 80%
= 40%
Percentage of pupils who wear scarves
= 6% + 40%
= 46%
Percentage of pupils who do not wear scarves
= 100% - 46%
= 54%
Answer: 54%
