PSLE Students in a school are put into two groups for an excursion.
12 of the students are in Group A and the rest in Group B.
29 of the students in Group A are boys. In the school,
49 of the students are boys. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
1x9 |
1x9 |
2x9 |
|
|
9x2 |
9 u |
9 u |
18 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
2 |
7 |
|
|
4x2 |
5x2 |
2 u |
7 u |
6 u |
3 u |
8 u |
10 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 2 and 9 is 18.
Number of boys in Group B
= 8 u - 2 u
= 6 u
Fraction of the students in Group B that are boys
=
69=
23Answer(s):
23