How many kg of rice costing Rs. 42 per kg should be mixed with \(7\frac{1}{2}\) kg rice costing Rs. 50 per kg so that by selling the mixture at Rs. 53.10 per kg, there is gain of 18%?

How many kg of rice costing Rs. 42 per kg should be mixed with \(7\fr

1.	How many kg of rice costing Rs. 42 per kg should be mixed with \(7\frac{1}{2}\) kg rice costing Rs. 50 per kg so that by selling the mixture at Rs. 53.10 per kg, there is gain of 18%?
A.	\(12\frac{1}{2}\)
B.	\(10\frac{1}{2}\)
C.	8
D.	9
Answer» B. \(10\frac{1}{2}\)

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How many kg of rice costing Rs. 42 per kg should be mixed with \(7\frac{1}{2}\) kg rice costing Rs. 50 per kg so that by selling the mixture at Rs. 53.10 per kg, there is gain of 18%?

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