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1. 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 40kg and that of section B is 35kg, find the average weight of the whole class.
= (36 × 40 + 44 × 35) kg = 2980 kg.
Therefore average weight of the whole class = kg
Therefore average weight = 37.25 kg
Solution:
The total weight of (36 + 44) Students of A and B,= (36 × 40 + 44 × 35) kg = 2980 kg.
Therefore average weight of the whole class = kg
Therefore average weight = 37.25 kg