PSLE Pupils in a school are put into two groups for an excursion.
58 of the pupils are in Group A and the rest in Group B.
1315 of the pupils in Group A are boys. In the school,
23 of the pupils are boys. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
5x3 |
3x3 |
8x3 |
|
|
3x8 |
15 u |
9 u |
24 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
13 |
2 |
|
|
2x8 |
1x8 |
13 u |
2 u |
3 u |
6 u |
16 u |
8 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 8 and 3 is 24.
Number of boys in Group B
= 16 u - 13 u
= 3 u
Number of girls in Group B
= 9 u - 3 u
= 6 u
Fraction of the pupils in Group B that are girls
=
69=
23Answer(s):
23