A shopkeeper bought 600 kg of rice. He sold a part of it at 15% profit and the remaining at 20% loss. If he incurred an overall loss of 6%, what quantity of rice was sold at 20% loss?
Explanation:
Let the quantity sold at 15% profit be x kg. The quantity sold at 20% loss is (600 - x) kg. Overall loss is 6%. So, 15x - 20(600 - x) = -6 * 600. 15x - 12000 + 20x = -3600. 35x = 8400. x = 240. Quantity sold at 20% loss = 600 - 240 = 360 kg.
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