Question

The average weight of 50 people is 40 kg. If one person leaves the group and the average decreases by one, what is the weight of the person who left?

• A. 79 kg
• B. 59 kg
• C. 49 kg
• D. 89 kg

Answer 1

Answer:

D. 89 kg

Total weight of 50 people = 50 x 40 = 2000 Total weight of 49 people = 49 x 39 = 1911 Weight of the person who left = 2000 - 1911 = 89