Question
A merchant mixes 9 kg of beans at Rs. 7 per kg with 6 kg
at Rs. 5 per kg. What is the cost price (in Rs.) of the mixture per kg?Solution
Required cost price = (6 × 9 + 5 × 7) ÷ (9 + 7) = (89 / 16) = Rs. 5.56
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