PSLE Pupils in a school are put into two groups for an excursion.
14 of the pupils are in Group A and the rest in Group B.
13 of the pupils in Group A are boys. In the school,
712 of the pupils are boys. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
1x3 |
3x3 |
4x3 |
|
|
12x1 |
3 u |
9 u |
12 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
1 |
2 |
|
|
7x1 |
5x1 |
1 u |
2 u |
6 u |
3 u |
7 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 4 and 12 is 12.
Number of boys in Group B
= 7 u - 1 u
= 6 u
Fraction of the pupils in Group B that are boys
=
69=
23Answer(s):
23