PSLE Students in a school are put into two groups for an excursion.
310 of the students are in Group A and the rest in Group B.
89 of the students in Group A are boys. In the school,
23 of the students are boys. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
3x3 |
7x3 |
10x3 |
|
|
3x10 |
9 u |
21 u |
30 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
8 |
1 |
|
|
2x10 |
1x10 |
8 u |
1 u |
12 u |
9 u |
20 u |
10 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 10 and 3 is 30.
Number of boys in Group B
= 20 u - 8 u
= 12 u
Number of girls in Group B
= 21 u - 12 u
= 9 u
Fraction of the students in Group B that are girls
=
921=
37Answer(s):
37