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ATQ, Let the marked price of the item be Rs. '15p' So, selling price of the item = 5p × (4/5) = Rs. '12p' So, discount % = {(15p - 12p)/15p} × 100 = 20% So, cost price of the article = 12p ÷ 1.2 = Rs. '10p' So, required ratio = 10p:15p = 2:3
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