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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:

A. Rs. 18 B. Rs. 18.50 C. Rs. 19 D. Rs. 19.50 Answer: Option A
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Solution(By Apex Team)

Let the price of the mixed variety be Rs. x per kg. By rule of alligation, we have: $\begin{array}{l}\therefore\Large\frac{20-x}{x-15}=\frac{2}{3}\\ \Rightarrow60-3x=2x-30\\ \Rightarrow5x=90\\ \Rightarrow x=18\end{array}$

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