PSLE Pupils in a school are put into two groups for an excursion.
12 of the pupils are in Group A and the rest in Group B.
16 of the pupils in Group A are boys. In the school,
512 of the pupils are boys. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
1x6 |
1x6 |
2x6 |
|
|
12x1 |
6 u |
6 u |
12 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
1 |
5 |
|
|
5x1 |
7x1 |
1 u |
5 u |
4 u |
2 u |
5 u |
7 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 2 and 12 is 12.
Number of boys in Group B
= 5 u - 1 u
= 4 u
Number of girls in Group B
= 6 u - 4 u
= 2 u
Fraction of the pupils in Group B that are girls
=
26=
13Answer(s):
13