PSLE Students in a school are put into two groups for an excursion.
12 of the students are in Group A and the rest in Group B.
89 of the students in Group A are girls. In the school,
79 of the students are girls. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
1x9 |
1x9 |
2x9 |
|
|
9x2 |
9 u |
9 u |
18 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
8 |
1 |
|
|
7x2 |
2x2 |
8 u |
1 u |
6 u |
3 u |
14 u |
4 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 2 and 9 is 18.
Number of girls in Group B
= 14 u - 8 u
= 6 u
Fraction of the students in Group B that are girls
=
69=
23Answer(s):
23