There were an equal number of girls in Class 4L and Class 4M.
23 of the pupils in Class 4L are girls and
37 of the pupils in Class 4M are boys. Given that there are a total of 15 boys in the two classes, how many pupils are there in Class 4M?
| Class 4L |
Class 4M |
| Girls |
Boys |
Girls |
Boys |
| 2x2 |
1x2 |
4 |
3 |
| 4 u |
2 u |
4 u |
3 u |
Fraction of girls in Class 4M
= 1 -
37=
47The number of girls in Class 4L and Class 4M is the same. Make the numerators the same.
2x23x2 of pupils in Class 4L =
47 of pupils in Class 4M
46 of pupils in Class 4L =
47 of pupils in Class 4M
Total number of boys
= 2 u + 3 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Number of pupils in Class 4M
= 7 u
= 7 x 3
= 21
Answer(s): 21
