There were an equal number of girls in Class 1K and Class 1L.
23 of the students in Class 1K are girls and
17 of the students in Class 1L are boys. Given that there are a total of 20 boys in the two classes, how many students are there in Class 1L?
| Class 1K |
Class 1L |
| Girls |
Boys |
Girls |
Boys |
| 2x3 |
1x3 |
6 |
1 |
| 6 u |
3 u |
6 u |
1 u |
Fraction of girls in Class 1L
= 1 -
17=
67The number of girls in Class 1K and Class 1L is the same. Make the numerators the same.
2x33x3 of students in Class 1K =
67 of students in Class 1L
69 of students in Class 1K =
67 of students in Class 1L
Total number of boys
= 3 u + 1 u
= 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Number of students in Class 1L
= 7 u
= 7 x 5
= 35
Answer(s): 35
