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A shopkeeper buys three types of pens. The first type costs him 6 pens for ₹35, the second 4 pens for ₹24, and the third 12 pens for ₹75. He mixes them in the ratio 4:3:5. If he sells all the pens at 5 for ₹32, what is his approximate gain or loss percentage?
- Loss of 6.5%
- Profit of 5.8%
- Profit of 10.5%
- Loss of 8.2%
Correct answer: Profit of 5.8%
Solution
Compute the cost per pen of each type and take the weighted average using the ratio 4:3:5. Compare this average cost with the selling price per pen to get the gain percentage.
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