PSLE Pupils in a school are put into two groups for an excursion.
25 of the pupils are in Group A and the rest in Group B.
34 of the pupils in Group A are girls. In the school,
12 of the pupils are girls. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
2x2 |
3x2 |
5x2 |
|
|
2x5 |
4 u |
6 u |
10 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
3 |
1 |
|
|
1x5 |
1x5 |
3 u |
1 u |
2 u |
4 u |
5 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 5 and 2 is 10.
Number of girls in Group B
= 5 u - 3 u
= 2 u
Fraction of the pupils in Group B that are girls
=
26=
13Answer(s):
13