Question

The average weight of all the students of classes
I and II equals the average of the average weight of
the students of the two classes. There are twice as
many students in class II as in class I. The sum of
twice the average weight of the students of class I
and the average weight of the students of class II is
60 kg. Find the average weight of class I (in kg).​

Answer 1

Answer:

the answer is 30 kg

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