PSLE Students in a school are put into two groups for an excursion.
512 of the students are in Group A and the rest in Group B.
710 of the students in Group A are girls. In the school,
38 of the students are girls. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
5x2 |
7x2 |
12x2 |
|
|
8x3 |
10 u |
14 u |
24 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
7 |
3 |
|
|
3x3 |
5x3 |
7 u |
3 u |
2 u |
12 u |
9 u |
15 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 12 and 8 is 24.
Number of girls in Group B
= 9 u - 7 u
= 2 u
Number of boys in Group B
= 14 u - 2 u
= 12 u
Fraction of the students in Group B that are boys
=
1214=
67Answer(s):
67