PSLE Students in a school are put into two groups for an excursion.
110 of the students are in Group A and the rest in Group B.
13 of the students in Group A are girls. In the school,
13 of the students are girls. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
1x3 |
9x3 |
10x3 |
|
|
3x10 |
3 u |
27 u |
30 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
1 |
2 |
|
|
1x10 |
2x10 |
1 u |
2 u |
9 u |
18 u |
10 u |
20 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 girls in Group B
= 10 u - 1 u
= 9 u
Fraction of the students in Group B that are girls
=
927=
13Answer(s):
13