In a class, there are three groups A, B and C

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?

1. It increases.
2. In decreases.
3. It remains the same.
4. No conclusion can be drawn due to insufficient data.

• Answer: The correct option is C
• Explanation:

  Average weight of the students of the class = (Total weight of students of the class) / (Total number of students in the class)

  As no student left the class, nor any new student joined, so both the total weight and number of students remain the same.

  Hence, the average weight remains the same.

• Exam Year: 2020