Question
Average weight of a team of 8 persons is 50 kg. When one
more person joins the team, the average weight of the team increases by 7 kg. Find the weight of new personSolution
Sum of weights of 8 persons = 50 × 8 = 400 kg Sum of weights of 9 persons = (50 + 7) × 9 = 513 kg Weight of new person = 513 – 400 = 113 kg
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