PSLE Pupils in a school are put into two groups for an excursion.
27 of the pupils are in Group A and the rest in Group B.
58 of the pupils in Group A are boys. In the school,
34 of the pupils are boys. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
2x4 |
5x4 |
7x4 |
|
|
4x7 |
8 u |
20 u |
28 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
5 |
3 |
|
|
3x7 |
1x7 |
5 u |
3 u |
16 u |
4 u |
21 u |
7 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
= 21 u - 5 u
= 16 u
Fraction of the pupils in Group B that are boys
=
1620=
45Answer(s):
45