PSLE Pupils in a school are put into two groups for an excursion.
59 of the pupils are in Group A and the rest in Group B.
910 of the pupils in Group A are boys. In the school,
56 of the pupils are boys. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
5x2 |
4x2 |
9x2 |
|
|
6x3 |
10 u |
8 u |
18 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
9 |
1 |
|
|
5x3 |
1x3 |
9 u |
1 u |
6 u |
2 u |
15 u |
3 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 9 and 6 is 18.
Number of boys in Group B
= 15 u - 9 u
= 6 u
Number of girls in Group B
= 8 u - 6 u
= 2 u
Fraction of the pupils in Group B that are girls
=
28=
14Answer(s):
14