PSLE Pupils in a school are put into two groups for an excursion.
710 of the pupils are in Group A and the rest in Group B.
1314 of the pupils in Group A are boys. In the school,
34 of the pupils are boys. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
7x2 |
3x2 |
10x2 |
|
|
4x5 |
14 u |
6 u |
20 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
13 |
1 |
|
|
3x5 |
1x5 |
13 u |
1 u |
2 u |
4 u |
15 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 10 and 4 is 20.
Number of boys in Group B
= 15 u - 13 u
= 2 u
Number of girls in Group B
= 6 u - 2 u
= 4 u
Fraction of the pupils in Group B that are girls
=
46=
23Answer(s):
23