There are some pupils in the fun fair.
310 of them are boys, of whom 60% of them do not wear scarves.
17 of the girls do not wear scarves. What is the percentage of the pupils in the fun fair who wear scarves?
Boys |
Girls |
Total |
3x5 = 15 u |
7x5 = 35 u |
10x5 = 50 u |
No scarves |
Scarves |
No scarves |
Scarves |
|
3x3 |
2x3 |
1x5 |
6x5 |
|
9 u |
6 u |
5 u |
30 u |
50 u |
60% =
60100=
35 The number of boys is the repeated identity. Make the number of boys the same. LCM of 3 and 5 is 15.
Number of pupils who wear scarves
= 6 u + 30 u
= 36 u
Total number of pupils
= 9 u + 6 u + 5 u + 30 u
= 50 u
Percentage of the pupils in the fun fair who wear scarves
=
3650 x 100%
= 72%
Answer(s): 72%