There were an equal number of girls in Class 5G and Class 5H.
23 of the pupils in Class 5G are girls and
15 of the pupils in Class 5H are boys. Given that there are a total of 18 boys in the two classes, how many pupils are there in Class 5H?
| Class 5G |
Class 5H |
| Girls |
Boys |
Girls |
Boys |
| 2x2 |
1x2 |
4 |
1 |
| 4 u |
2 u |
4 u |
1 u |
Fraction of girls in Class 5H
= 1 -
15=
45The number of girls in Class 5G and Class 5H is the same. Make the numerators the same.
2x23x2 of pupils in Class 5G =
45 of pupils in Class 5H
46 of pupils in Class 5G =
45 of pupils in Class 5H
Total number of boys
= 2 u + 1 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Number of pupils in Class 5H
= 5 u
= 5 x 6
= 30
Answer(s): 30
