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 : (M.B.A. 2002)
A) Rs. 18
B) Rs. 18.50
C) Rs. 19
D) Rs. 19.50
Let the price of the mixed variety be Rs. x per kg.