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