The average mass of 5 boxes is 2.4 kg. The total mass of 3 of these boxes is 4.2 kg. Find the average mass of the remaining 2 boxes.
Show Worked Solution
Worked Solution
Step 1: Total mass of all 5 boxes = 5 × 2.4 = 12 kg.
Step 2: Total mass of remaining 2 boxes = 12 − 4.2 = 7.8 kg.
Step 3: Average mass of remaining 2 boxes = 7.8 ÷ 2 = 3.9 kg.
Answer: 3.9 kg
Correct answer: 3.9 kg
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