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Selling price of the article = a + (4a/5) = Rs. (9a/5) So, (9a/5) = (2.5 × a – 250) × 0.80 Or, 1.8a = (2.5a – 250) × 0.80 Or, 2.25a = 2.5a – 250 Or, 0.25a = 250 Or, a = 1000 So, marked price of the article = 2.5 × 1000 = Rs. 2500
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