Multiple choice

If 25 kg of rice costing Rs. 12 per kg is mixed with 15 kg of a second variety of rice costing Rs. 16 per kg, what is the average cost of the resulting mixture?

  1. Rs. 14.5

  2. Rs. 13.5

  3. Rs. 12

  4. Rs. 12.5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total cost = (25 * 12) + (15 * 16) = 300 + 240 = 540. Total weight = 25 + 15 = 40 kg. Average cost = 540 / 40 = 13.5.

AI explanation

Using the weighted average formula, the total cost of the first variety is 25 kg times Rs. 12, which equals Rs. 300, and the total cost of the second variety is 15 kg times Rs. 16, which equals Rs. 240. The combined cost is 300 plus 240, resulting in Rs. 540, and the combined weight is 25 plus 15, resulting in 40 kg. Dividing Rs. 540 by 40 kg gives an average cost of Rs. 13.5 per kg.

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