PSLE Pupils in a school are put into two groups for an excursion.
38 of the pupils are in Group A and the rest in Group B.
59 of the pupils in Group A are boys. In the school,
712 of the pupils are boys. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
3x3 |
5x3 |
8x3 |
|
|
12x2 |
9 u |
15 u |
24 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
5 |
4 |
|
|
7x2 |
5x2 |
5 u |
4 u |
9 u |
6 u |
14 u |
10 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 8 and 12 is 24.
Number of boys in Group B
= 14 u - 5 u
= 9 u
Number of girls in Group B
= 15 u - 9 u
= 6 u
Fraction of the pupils in Group B that are girls
=
615=
25Answer(s):
25