When a new person replaces one who weighs 65 kg, the average weight of the eight people increases by 2.5 kg. What may the new person's weight be?
A. 76 kg
B. 76.5 kg
C. 85 kg
D. None of these
Answer:C
When a new person replaces one who weighs 65 kg, the average weight of the eight people increases by 2.5 kg. What may the new person's weight be?
A. 76 kg B. 76.5 kg C. 85 kg D. None of these
Explanation: Increased total weight = (8 x 2.5) kg = 20 kilogram.The new person's weight is (65 + 20) kg, which equals 85 kg.