In a warehouse, there are 3 stacks of bricks. The average weight of the bricks in Stack A is 112.5 kg, in Stack B is 118.75 kg, and in Stack C is 107.25 kg. If Stack A has 12 bricks, Stack B has 8 bricks, and Stack C has 16 bricks, find the overall average weight of all bricks in the warehouse.
Show answer & explanation
Correct answer: A
Explanation
Given:
Average of pile A = 112.5 kg, bricks = 12
Average of pile B = 118.75 kg, bricks = 8
Average of pile C = 107.25 kg, bricks = 16
Total weight of pile A = 112.5 × 12 = 1350
Total weight of pile B = 118.75 × 8 = 950
Total weight of pile C = 107.25 × 16 = 1716
Total weight = 1350 + 950 + 1716 = 4016
Total bricks = 12 + 8 + 16 = 36
Total average weight = 4016 / 36 = 111.55 kg