A shopkeeper marked an article P% above its cost price and sold it for Rs. 1440 after giving a discount of 20%. If the ratio of cost price and selling price of the article is 25:30, respectively, then find the selling price if the article is sold at a profit of (P + 15)%.
Cost price of the article = (25/30) × 1440 = Rs. 1200 Marked price of the article = 1440/0.8 = Rs. 1800 P% = [(1800 – 1200)/1200] × 100 = 50% Or, P = 50 Desired selling price = 1200 × 1.65 = Rs. 1980
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