PSLE Students in a school are put into two groups for an excursion.
25 of the students are in Group A and the rest in Group B.
78 of the students in Group A are boys. In the school,
34 of the students are boys. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
2x4 |
3x4 |
5x4 |
|
|
4x5 |
8 u |
12 u |
20 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
7 |
1 |
|
|
3x5 |
1x5 |
7 u |
1 u |
8 u |
4 u |
15 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 5 and 4 is 20.
Number of boys in Group B
= 15 u - 7 u
= 8 u
Number of girls in Group B
= 12 u - 8 u
= 4 u
Fraction of the students in Group B that are girls
=
412=
13Answer(s):
13