QUESTION

CSAT

Hard

Reasoning

Prelims 2020

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?

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Explanation

Formula for Average Weight: Average Weight= Total Number of StudentsTotal Weight of Students\frac{Total\ Number\ of\ Students}{Total\ Weight\ of\ Students} ​ Key Information: No student left the class. No new student joined the class.

Result: Since the total weight and number of students remain unchanged, the average weight remains the same.

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