There were an equal number of girls in Class 5P and Class 5Q.
23 of the students in Class 5P are girls and
15 of the students in Class 5Q are boys. Given that there are a total of 18 boys in the two classes, how many students are there in Class 5Q?
| Class 5P |
Class 5Q |
| Girls |
Boys |
Girls |
Boys |
| 2x2 |
1x2 |
4 |
1 |
| 4 u |
2 u |
4 u |
1 u |
Fraction of girls in Class 5Q
= 1 -
15=
45The number of girls in Class 5P and Class 5Q is the same. Make the numerators the same.
2x23x2 of students in Class 5P =
45 of students in Class 5Q
46 of students in Class 5P =
45 of students in Class 5Q
Total number of boys
= 2 u + 1 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Number of students in Class 5Q
= 5 u
= 5 x 6
= 30
Answer(s): 30
