There are some pupils in the fun fair.
310 of them are girls, of whom 20% of them do not wear glasses.
47 of the boys do not wear glasses. What is the percentage of the pupils in the fun fair who do not wear glasses?
| Girls |
Boys |
Total |
3x5 =
15 u |
7x5 =
35 u |
10x5 =
50 u |
| No glasses |
Glasses |
No glasses |
Glasses |
|
| 1x3 |
4x3 |
4x5 |
3x5 |
|
| 3 u |
12 u |
20 u |
15 u |
50 u |
20% =
20100=
15 The number of girls is the repeated identity. Make the number of girls the same. LCM of 3 and 5 is 15.
Number of pupils who do not wear glasses
= 3 u + 20 u
= 23 u
Total number of pupils
= 3 u + 12 u + 20 u + 15 u
= 50 u
Percentage of the pupils in the fun fair who do not wear glasses
=
2350 x 100%
= 46%
Answer(s): 46%
