Question
How much soda should be mixed with 20 kg of sugar cost
Rs.30/kg so that a gain of 20% can be made after selling the mixture at Rs.24/kg?Solution
ATQ, Gain percentage = 20% CP of the mixture = [24 × (100/120)] = Rs.20/kg Applying allegation theorem, 
So, Ratio of quantity of sugar and soda = 2:1 Hence Quantity of Soda required = [(1/2) × 20] = 10 kg
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