- A30 kg
- B26 kg
- C28 kg
- D32 kg
Step-by-Step Solution
Four boxes total 100 kg (so the 4th weighs 26 kg). Five boxes total 130 kg. Fifth = 30 kg.
Answer: A) 30 kg
The average weight of four boxes is 25 kg; three of them weigh 22, 28 and 24 kg. A fifth box is added and the average becomes 26 kg. How heavy is the fifth box?
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