12 kg of rice costing 30 Rs. per kg is mixed with 8 kg of rice costing 40 Rs. per kg. The average per kg price of mixed rice is:

12 kg of rice costing 30 Rs. per kg is mixed with 8 kg of rice costing 40 Rs. per kg. The average per kg price of mixed rice is:
[A]34 Rs.
[B]35 Rs.
[C]37 Rs.
[D]38 Rs.

34 Rs.
Total cost price of 20 kg of mixed rice = (12\times 30 + 8 \times 40) = 680Rs.
∴ Average per kg price = \frac{680}{20} = 34Rs.
Hence option [A] is the right answer.

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