PSLE Students in a school are put into two groups for an excursion.
37 of the students are in Group A and the rest in Group B.
59 of the students in Group A are boys. In the school,
13 of the students are boys. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
3x3 |
4x3 |
7x3 |
|
|
3x7 |
9 u |
12 u |
21 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
5 |
4 |
|
|
1x7 |
2x7 |
5 u |
4 u |
2 u |
10 u |
7 u |
14 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 7 and 3 is 21.
Number of boys in Group B
= 7 u - 5 u
= 2 u
Fraction of the students in Group B that are boys
=
212=
16Answer(s):
16