The cost of Type 1 rice is Rs.15 per kg and Type 2 rice is Rs.20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then the price per kg of the mixed variety of rice is
Answers:
A) Rs.19.50  B) Rs.19  C) Rs.18  D) Rs.18.50  E) None
Let the price of the mixed variety be Rs. x per kg. By the rule of alligation, we have :   (20-x)/(x-15) = 2/3 =› 60 - 3x = 2x - 30   =› 5x = 90 =› x = 18.   so, price of the mixture is Rs. 18 per kg.   Answer Rs.18
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The cost of Type 1 rice is Rs.15 per kg and Type 2 rice is Rs.20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then the price per kg of the mixed variety of rice is