The bar graph shows the masses of 4 boxes A, B, C and D. Their total mass is 48 kg. A fifth box, Box E, weighs 4 kg MORE than the average mass of boxes A, B, C and D. Find the average mass of all 5 boxes.
Show Worked Solution
Worked Solution
Step 1: Find the average mass of the first 4 boxes.
Average of A–D = 48 ÷ 4 = 12 kg.
Step 2: Find Box E's mass.
Box E = 12 + 4 = 16 kg.
Step 3: Find the total mass of all 5 boxes.
Total = 48 + 16 = 64 kg.
Step 4: Find the average of all 5 boxes.
Average = 64 ÷ 5 = 12.8 kg.
Answer: 12.8 kg
Correct answer: 12.8 kg
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