90% of the students are girls. 30% of the girls and 80% of the boys wear scarves. What percentage of the students do not wear scarves?
Girls |
Boys |
Total |
90% |
10% |
100% |
Wear scarves |
Do not wear |
Wear scarves |
Do not wear |
|
27% |
63% |
8% |
2% |
100% |
Number of girls who wear scarves
= 30% x 90%
=
30100 x 90%
= 27%
Number of boys who wear scarves
= 80% x 10%
=
80100 x 10%
= 8%
Percentage of students who wear scarves
= 27% + 8%
= 35%
Percentage of students who do not wear scarves
= 100% - 35%
= 65%
Answer: 65%