Question:How many kilograms of sugar costing Rs. 9 per kg must be mixed with 27 kg of sugar costing Rs. 7 per kg so that there may be a gain of 10% by selling the mixture at Rs. 9.24 per kg ? 

A 54 kg 
B 63 kg 
C 36 kg 
D 42 kg 

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B 

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Naim Arif

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