MCQOPTIONS
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				| 1. | 
                                    12 copies of a book were sold for Rs. 1800 thereby gaining cost price of 3 copies. The cost price of a copy of the book is | 
                            
| A. | Rs. 120 | 
| B. | Rs. 150 | 
| C. | Rs. 1200 | 
| D. | Rs. 1500 | 
| Answer» B. Rs. 150 | |