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A merchant bought 5 pens each at Rs 8 and some more pens at Rs 6 each. He sold all pens at Rs 7 each and earns a total profit of Rs 10. How many pens were bought by the merchant at Rs 6? (1) 10 (2) 15 (3) 20 (4) 25 |
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Answer» Correct answer is (2) 15 |
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