There were an equal number of girls in Class 2M and Class 2N.
23 of the pupils in Class 2M are girls and
17 of the pupils in Class 2N are boys. Given that there are a total of 16 boys in the two classes, how many pupils are there in Class 2N?
| Class 2M |
Class 2N |
| Girls |
Boys |
Girls |
Boys |
| 2x3 |
1x3 |
6 |
1 |
| 6 u |
3 u |
6 u |
1 u |
Fraction of girls in Class 2N
= 1 -
17=
67The number of girls in Class 2M and Class 2N is the same. Make the numerators the same.
2x33x3 of pupils in Class 2M =
67 of pupils in Class 2N
69 of pupils in Class 2M =
67 of pupils in Class 2N
Total number of boys
= 3 u + 1 u
= 4 u
4 u = 16
1 u = 16 ÷ 4 = 4
Number of pupils in Class 2N
= 7 u
= 7 x 4
= 28
Answer(s): 28
