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A trader purchased three kinds of bags B1, B2 and B3 whose cost prices were in the ratio 4 : 5 : 6. He earned a profit of 35% on B1 and 18% on B2 but suffered a loss of 15% on B3. Approximately what was his overall percentage gain or loss on the whole deal?
- Profit of 12.6%
- Loss of 4.8%
- Profit of 9.3%
- Loss of 6.4%
Correct answer: Profit of 9.3%
Solution
Taking costs as 4, 5, 6 (total 15), the gains are +1.4, +0.9, and -0.9, summing to +1.4. Overall gain = 1.4/15 = about 9.3% profit.
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