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30 horses were purchased for Rs. 12000. The average cost of 12 horses out of them is Rs 250. Find the average cost of the remaining horses.

A.	Rs 550	B.	Rs 500
C.	Rs 650	D.	Rs 600

Answer and Explanation

Answer:Rs 500

Explanation:
Cost of 12 horses= 12(250) = Rs 3000
Cost of remaining 18 horses = Rs 9000
Average cost of eighteen horses = 9000/18 = Rs 500

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