Question

The average weight of 12 boxes is 63 kg. If four boxes having an average weight of 70 kg are removed, then what will be new average weight of the remaining boxes?

• A. 60 kg
• B. 59 kg
• C. 60.5 kg
• D. 59.5 kg

Answer 1

Answer:

D. 59.5 kg

Solution:

Average weight of 12 boxes = 63 kg

Total weight of 12 boxes $= 12\times{63} = 756$

Average of 4 boxes = 70 kg

Total weight of 4 boxes $= 70\times{4} = 280 kg$

These 4 boxes are removed, Total weight left = 756 - 280 = 476 kg

Total box left = 12 - 4 = 8

Average weight of remaining 8 boxes $=\frac{476}{8} = 59.5 kg$