PSLE Pupils in a school are put into two groups for an excursion.
411 of the pupils are in Group A and the rest in Group B.
38 of the pupils in Group A are boys. In the school,
12 of the pupils are boys. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
4x2 |
7x2 |
11x2 |
|
|
2x11 |
8 u |
14 u |
22 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
3 |
5 |
|
|
1x11 |
1x11 |
3 u |
5 u |
8 u |
6 u |
11 u |
11 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 11 and 2 is 22.
Number of boys in Group B
= 11 u - 3 u
= 8 u
Fraction of the pupils in Group B that are boys
=
814=
47Answer(s):
47