Cost price of the first article = Selling price / (1 + Profit%) = 450 / 1.2 = ₹375. Cost price of the second article = Selling price / (1 - Loss%) = 450 / 0.9 = ₹500. Total cost price = ₹375 + ₹500 = ₹875. Total selling price = ₹450 + ₹450 = ₹900. Profit = Selling price - Cost price = ₹900 - ₹875 = ₹25. Profit percentage = (Profit/Cost price) × 100 = (25/875) × 100 ≈ 2.86%. Answer: b)
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