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Question

There are two sections A and B of a class consisting of 36 and 44 students respectively. If the average weight of section A is 40 kg and that of section B is 35 kg, find the average weight of the whole class?

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Solution

Total weight of 80(36+44) students

=36×40+44×35kg

=1440+1540=2980 kg.

weight of the total class=298080kg =37.25 kg

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