12 copies of a book were sold for Rs. 1800/- thereby gaining cost-price of 3 copies. The cost price of a copy is: - Study24x7
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12 copies of a book were sold for Rs. 1800/- thereby gaining cost-price of 3 copies. The cost price of a copy is:

A

Rs. 120/-

B

Rs. 150/-

C

Rs. 1200/-

D

Rs. 1500/-

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