The average weight of six persons in the lift is 48 kg. If four more persons with average weight 51 kg board the lift, then average weight (in kg) of all the persons in the lift will be
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 49.2
average weight of 6 persons= 48
Total weight T1 = 48 × 6 = 288
average weight of another 4 persons= 51
Total weight T2 = 51 × 4 = 204
Overall average = \(\frac{T1 + T2}{total Persons}\) = \(\frac{288+204}{10}\) = 49.2