There are some pupils in the stadium.
15 of them are girls, of whom 60% of them do not wear scarves.
34 of the boys do not wear scarves. What is the percentage of the pupils in the stadium who wear scarves?
| Girls |
Boys |
Total |
1x5 =
5 u |
4x5 =
20 u |
5x5 =
25 u |
| No scarves |
Scarves |
No scarves |
Scarves |
|
| 3x1 |
2x1 |
3x5 |
1x5 |
|
| 3 u |
2 u |
15 u |
5 u |
25 u |
60% =
60100=
35 The number of girls is the repeated identity. Make the number of girls the same. LCM of 1 and 5 is 5.
Number of pupils who wear scarves
= 2 u + 5 u
= 7 u
Total number of pupils
= 3 u + 2 u + 15 u + 5 u
= 25 u
Percentage of the pupils in the stadium who wear scarves
=
725 x 100%
= 28%
Answer(s): 28%
