PSLE Students in a school are put into two groups for an excursion.
13 of the students are in Group A and the rest in Group B.
45 of the students in Group A are boys. In the school,
25 of the students are boys. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
1x5 |
2x5 |
3x5 |
|
|
5x3 |
5 u |
10 u |
15 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
4 |
1 |
|
|
2x3 |
3x3 |
4 u |
1 u |
2 u |
8 u |
6 u |
9 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 3 and 5 is 15.
Number of boys in Group B
= 6 u - 4 u
= 2 u
Fraction of the students in Group B that are boys
=
210=
15Answer(s):
15