PSLE Pupils in a school are put into two groups for an excursion.
38 of the pupils are in Group A and the rest in Group B.
19 of the pupils in Group A are boys. In the school,
16 of the pupils are boys. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
3x3 |
5x3 |
8x3 |
|
|
6x4 |
9 u |
15 u |
24 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
1 |
8 |
|
|
1x4 |
5x4 |
1 u |
8 u |
3 u |
12 u |
4 u |
20 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 8 and 6 is 24.
Number of boys in Group B
= 4 u - 1 u
= 3 u
Fraction of the pupils in Group B that are boys
=
315=
15Answer(s):
15