There were an equal number of girls in Class 4H and Class 4J.
23 of the students in Class 4H are girls and
19 of the students in Class 4J are boys. Given that there are a total of 15 boys in the two classes, how many students are there in Class 4J?
| Class 4H |
Class 4J |
| Girls |
Boys |
Girls |
Boys |
| 2x4 |
1x4 |
8 |
1 |
| 8 u |
4 u |
8 u |
1 u |
Fraction of girls in Class 4J
= 1 -
19=
89The number of girls in Class 4H and Class 4J is the same. Make the numerators the same.
2x43x4 of students in Class 4H =
89 of students in Class 4J
812 of students in Class 4H =
89 of students in Class 4J
Total number of boys
= 4 u + 1 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Number of students in Class 4J
= 9 u
= 9 x 3
= 27
Answer(s): 27
