PSLE Students in a school are put into two groups for an excursion.
27 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,
14 of the students are girls. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
2x4 |
5x4 |
7x4 |
|
|
4x7 |
8 u |
20 u |
28 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
1 |
7 |
|
|
1x7 |
3x7 |
1 u |
7 u |
6 u |
14 u |
7 u |
21 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 7 and 4 is 28.
Number of girls in Group B
= 7 u - 1 u
= 6 u
Number of boys in Group B
= 20 u - 6 u
= 14 u
Fraction of the students in Group B that are boys
=
1420=
710Answer(s):
710