PSLE Students in a school are put into two groups for an excursion.
411 of the students are in Group A and the rest in Group B.
18 of the students in Group A are boys. In the school,
12 of the students are boys. What fraction of the students in Group B are girls?
Group A |
Group B |
Total |
4x2 |
7x2 |
11x2 |
|
|
2x11 |
8 u |
14 u |
22 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
1 |
7 |
|
|
1x11 |
1x11 |
1 u |
7 u |
10 u |
4 u |
11 u |
11 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 11 and 2 is 22.
Number of boys in Group B
= 11 u - 1 u
= 10 u
Number of girls in Group B
= 14 u - 10 u
= 4 u
Fraction of the students in Group B that are girls
=
414=
27Answer(s):
27