There are some pupils in the fun fair.
15 of them are girls, of whom 50% of them do not wear scarves.
34 of the boys do not wear scarves. What is the percentage of the pupils in the fun fair who do not wear scarves?
Girls |
Boys |
Total |
1x2 = 2 u |
4x2 = 8 u |
5x2 = 10 u |
No scarves |
Scarves |
No scarves |
Scarves |
|
1x1 |
1x1 |
3x2 |
1x2 |
|
1 u |
1 u |
6 u |
2 u |
10 u |
50% =
50100=
12 The number of girls is the repeated identity. Make the number of girls the same. LCM of 1 and 2 is 2.
Number of pupils who do not wear scarves
= 1 u + 6 u
= 7 u
Total number of pupils
= 1 u + 1 u + 6 u + 2 u
= 10 u
Percentage of the pupils in the fun fair who do not wear scarves
=
710 x 100%
= 70%
Answer(s): 70%