PSLE Students in a school are put into two groups for an excursion.
35 of the students are in Group A and the rest in Group B.
79 of the students in Group A are girls. In the school,
23 of the students are girls. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
3x3 |
2x3 |
5x3 |
|
|
3x5 |
9 u |
6 u |
15 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
7 |
2 |
|
|
2x5 |
1x5 |
7 u |
2 u |
3 u |
3 u |
10 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 5 and 3 is 15.
Number of girls in Group B
= 10 u - 7 u
= 3 u
Fraction of the students in Group B that are girls
=
36=
12Answer(s):
12