PSLE Students in a school are put into two groups for an excursion.
27 of the students are in Group A and the rest in Group B.
38 of the students in Group A are girls. In the school,
14 of the students are girls. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
2x4 |
5x4 |
7x4 |
|
|
4x7 |
8 u |
20 u |
28 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
3 |
5 |
|
|
1x7 |
3x7 |
3 u |
5 u |
4 u |
16 u |
7 u |
21 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 7 and 4 is 28.
Number of girls in Group B
= 7 u - 3 u
= 4 u
Fraction of the students in Group B that are girls
=
420=
15Answer(s):
15