Question
A trader mixes two kinds of wheat of 8 kg and 2 kg,
costing Rs. 3 and Rs. 9 per kg, respectively. What is the cost price (in Rs.) of the mixture per kg?Solution
Required cost price = (3 × 8 + 9 × 2) ÷ (8 + 2) = (42 / 10) = Rs. 4.2
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