- A20
- B11
- C10
- D9
Step-by-Step Solution
Total weight = kg. Sum of three = 7+8+11 = 26 kg. Fourth = 36 - 26 = 10 kg.
Answer: C) 10
The mean weight of 4 boxes is 9 kg.
Three of the boxes weigh 7 kg, 8 kg and 11 kg.
What is the weight of the fourth box?
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