There are some pupils in the fun fair.
35 of them are girls, of whom 75% of them do not wear scarves.
12 of the boys do not wear scarves. What is the percentage of the pupils in the fun fair who wear scarves?
| Girls |
Boys |
Total |
3x4 =
12 u |
2x4 =
8 u |
5x4 =
20 u |
| No scarves |
Scarves |
No scarves |
Scarves |
|
| 3x3 |
1x3 |
1x4 |
1x4 |
|
| 9 u |
3 u |
4 u |
4 u |
20 u |
75% =
75100=
34 The number of girls is the repeated identity. Make the number of girls the same. LCM of 3 and 4 is 12.
Number of pupils who wear scarves
= 3 u + 4 u
= 7 u
Total number of pupils
= 9 u + 3 u + 4 u + 4 u
= 20 u
Percentage of the pupils in the fun fair who wear scarves
=
720 x 100%
= 35%
Answer(s): 35%
