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.
710 of the students in Group A are boys. In the school,
710 of the students are boys. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
1x10 |
2x10 |
3x10 |
|
|
10x3 |
10 u |
20 u |
30 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
7 |
3 |
|
|
7x3 |
3x3 |
7 u |
3 u |
14 u |
6 u |
21 u |
9 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 3 and 10 is 30.
Number of boys in Group B
= 21 u - 7 u
= 14 u
Fraction of the students in Group B that are boys
=
1420=
710Answer(s):
710