The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?
76 kg
76.5 kg
85 kg
Data inadequate
Explanation:
Total weight increased = $\left(8 \times 2.5\right)$ kg = 20 kg.
Weight of new person = (65 + 20) kg = 85 kg.