PSLE Students in a school are put into two groups for an excursion.
13 of the students are in Group A and the rest in Group B.
34 of the students in Group A are girls. In the school,
712 of the students are girls. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
1x4 |
2x4 |
3x4 |
|
|
12x1 |
4 u |
8 u |
12 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
3 |
1 |
|
|
7x1 |
5x1 |
3 u |
1 u |
4 u |
4 u |
7 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 3 and 12 is 12.
Number of girls in Group B
= 7 u - 3 u
= 4 u
Fraction of the students in Group B that are girls
=
48=
12Answer(s):
12