PSLE Pupils in a school are put into two groups for an excursion.
15 of the pupils are in Group A and the rest in Group B.
14 of the pupils in Group A are girls. In the school,
34 of the pupils are girls. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
1x4 |
4x4 |
5x4 |
|
|
4x5 |
4 u |
16 u |
20 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
1 |
3 |
|
|
3x5 |
1x5 |
1 u |
3 u |
14 u |
2 u |
15 u |
5 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 5 and 4 is 20.
Number of girls in Group B
= 15 u - 1 u
= 14 u
Fraction of the pupils in Group B that are girls
=
1416=
78Answer(s):
78