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.
78 of the students in Group A are boys. In the school,
38 of the students are boys. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
1x8 |
2x8 |
3x8 |
|
|
8x3 |
8 u |
16 u |
24 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
7 |
1 |
|
|
3x3 |
5x3 |
7 u |
1 u |
2 u |
14 u |
9 u |
15 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 3 and 8 is 24.
Number of boys in Group B
= 9 u - 7 u
= 2 u
Number of girls in Group B
= 16 u - 2 u
= 14 u
Fraction of the students in Group B that are girls
=
1416=
78Answer(s):
78