PSLE Students in a school are put into two groups for an excursion.
49 of the students are in Group A and the rest in Group B.
18 of the students in Group A are girls. In the school,
16 of the students are girls. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
4x2 |
5x2 |
9x2 |
|
|
6x3 |
8 u |
10 u |
18 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
1 |
7 |
|
|
1x3 |
5x3 |
1 u |
7 u |
2 u |
8 u |
3 u |
15 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 9 and 6 is 18.
Number of girls in Group B
= 3 u - 1 u
= 2 u
Number of boys in Group B
= 10 u - 2 u
= 8 u
Fraction of the students in Group B that are boys
=
810=
45Answer(s):
45