Q. 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?

Explanation :

In a class there are three groups a b and c ….

1. Average weight = Total weight ÷ Number of students

2. When students are shifted between groups:
– Total weight of all students remains the same
– Total number of students remains the same
– Students are just reorganized within the same class

Example:
Let’s say in a class of 40 students:
– Total weight = 2000 kg
– Average weight = 2000 ÷ 40 = 50 kg

If students are divided into 2 groups:
– Whether 20-20 students
– Or 15-25 students
– Or any other combination
The class average will still be 50 kg because:
– Total weight is still 2000 kg
– Number of students is still 40

Therefore, shifting students between groups within the same class doesn’t affect the overall average weight.