Q. A man bought 13 articles at 70 Rs. each, 15 at 60 Rs. each and 12 at 65 Rs. Each. Then find the average price per article :
Answer: 64.75 Rs
Notes: Required Average price = $latex = \frac{13\times 70+15\times 60+12\times 65}{13+15+12}&s=1$ $latex = \frac{910+900+780}{40} = \frac{2590}{40} = 64.75\ Rs.&s=1$ Hence option [C] is correct answer.

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