There were an equal number of boys in Class 4G and Class 4H.
45 of the pupils in Class 4G are boys and
19 of the pupils in Class 4H are girls. Given that there are a total of 12 girls in the two classes, how many pupils are there in Class 4H?
| Class 4G |
Class 4H |
| Boys |
Girls |
Boys |
Girls |
| 4x2 |
1x2 |
8 |
1 |
| 8 u |
2 u |
8 u |
1 u |
Fraction of boys in Class 4H
= 1 -
19=
89The number of boys in Class 4G and Class 4H is the same. Make the numerators the same.
4x25x2 of pupils in Class 4G =
89 of pupils in Class 4H
810 of pupils in Class 4G =
89 of pupils in Class 4H
Total number of girls
= 2 u + 1 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Number of pupils in Class 4H
= 9 u
= 9 x 4
= 36
Answer(s): 36
