Question
A group of people consists of men, women, and children.
20% of them are men, 40% are women and rest are children, and their average weights are 50 kg, 40 kg and 50 kg, respectively. The average weight of the group ( in kg) is:Solution
Given: 20% men, avg weight = 50 kg 40% women, avg weight = 40 kg 40% children, avg weight = 50 kg Average weight = [(20 × 50) + (40 × 40) + (40 × 50)] ÷ 100 = (1000 + 1600 + 2000) ÷ 100 = 4600 ÷ 100 = 46 kg
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