PSLE Pupils in a school are put into two groups for an excursion.
17 of the pupils are in Group A and the rest in Group B.
14 of the pupils in Group A are boys. In the school,
14 of the pupils are boys. What fraction of the pupils in Group B are girls?
Group A |
Group B |
Total |
1x4 |
6x4 |
7x4 |
|
|
4x7 |
4 u |
24 u |
28 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
1 |
3 |
|
|
1x7 |
3x7 |
1 u |
3 u |
6 u |
18 u |
7 u |
21 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 7 and 4 is 28.
Number of boys in Group B
= 7 u - 1 u
= 6 u
Number of girls in Group B
= 24 u - 6 u
= 18 u
Fraction of the pupils in Group B that are girls
=
1824=
34Answer(s):
34