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 ar......

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

Let the price of the mixed variety be Rs. x per kg.

By the rule of alligation, we have :

Cost of 1 kg of type 1 rice           Cost of 1 kg of type 2 rice  

               15                                                 20

                                            x

             20-x                                               15-x

(20-x)/(x-15) = 2/3

60 - 3x = 2x - 30

 x = 18 rs.

Hence, option 4 is the correct answer.
          

By: Amit Kumar