There were an equal number of boys in Class 5K and Class 5L.
23 of the pupils in Class 5K are boys and
19 of the pupils in Class 5L are girls. Given that there are a total of 20 girls in the two classes, how many pupils are there in Class 5L?
Class 5K |
Class 5L |
Boys |
Girls |
Boys |
Girls |
2x4 |
1x4 |
8 |
1 |
8 u |
4 u |
8 u |
1 u |
Fraction of boys in Class 5L
= 1 -
19=
89The number of boys in Class 5K and Class 5L is the same. Make the numerators the same.
2x43x4 of pupils in Class 5K =
89 of pupils in Class 5L
812 of pupils in Class 5K =
89 of pupils in Class 5L
Total number of girls
= 4 u + 1 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of pupils in Class 5L
= 9 u
= 9 x 4
= 36
Answer(s): 36