PSLE Pupils in a school are put into two groups for an excursion.
12 of the pupils are in Group A and the rest in Group B.
14 of the pupils in Group A are boys. In the school,
38 of the pupils are boys. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
1x4 |
1x4 |
2x4 |
|
|
8x1 |
4 u |
4 u |
8 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
1 |
3 |
|
|
3x1 |
5x1 |
1 u |
3 u |
2 u |
2 u |
3 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 2 and 8 is 8.
Number of boys in Group B
= 3 u - 1 u
= 2 u
Number of girls in Group B
= 4 u - 2 u
= 2 u
Fraction of the pupils in Group B that are girls
=
24=
12Answer(s):
12