Question
A shopkeeper mixes two types of rice, costing $30 per kg
and $50 per kg, in the ratio 3:2. He sells the mixture at $45 per kg. What is his percentage profit or loss?Solution
Cost price of mixture per kg = (3 × 30 + 2 × 50) / (3 + 2) Cost price per kg = (90 + 100) / 5 = $38 Selling price = $45 per kg Profit = 45 - 38 = $7 Profit percentage = (7 / 38) × 100 ≈ 18.42%.
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