The average weight of all the vehicles in a parking is 4000 kg. The average weight of 12 vehicles is 6000 kg. Average weight of the remaining vehicles is 3000 kg. What is the total number of vehicles in the parking?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 36
Let the no. of vehicle be x.
Average = sum of all Vehicles/no. of vehicles.
A/c to question,
4000 × x = (6000 × 12) + {3000 × (x-12)}
4000x = 72000 + 3000x - 36000
1000x = 36000
x = 36.
Hence The total no. of vehicle are 36.