The average weight of a truck and four cars is 48 kg, which is reduced by 1 kg if the weight of the truck is excluded. What is the weight of the truck?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 52 kg.
We know that,
Average = Sum of observations/Number of observations
Now,
The average weight of a truck and four cars = 48 kg
Total weight of a truck and four cars = 48 × 5 = 240 kg
Average weight of 4 cars = 48 - 1 = 47 kg
Total weight of 4 cars = 47 × 4 = 188 kg
Weight of the truck = Total weight of a truck and four cars - Total weight of 4 cars
⇒ 240 - 188 = 52 kg