In a class, there are three groups A, B and C. If one student from group A and two students from group B are…
In a class, there are three groups A, B and C. If one student from group A and two students from group B are shifted to group C, then what happens to the average weight of the students of the class?
It increases.
It decreases.
It remains the same.
No conclusion can be drawn due to insufficient data.
Solution
Shifting students from one group to another within the same class does not add or remove any student; the total weight of all students and the total number of students remain unchanged. Therefore the average weight of the students of the class remains the same.