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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.
Sol. Ans.(c).
Class Average will remain same as nobody is coming in or going out of the class. So average weight equilibrium will be same as before shifting. A change can happen only if someone is added to the group(s) or someone leaves the group(s), not otherwise.
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