If books bought at prices ranging from Rs. 125 to Rs. 350 are sold at prices ranging from Rs. 170 to Rs 420, what is the greatest possible profit that might be made in selling 12 books ?	Choose the correct choice:  A) Rs. 3500  B) Rs. 3540  C) Rs. 3520  D) Rs. 3200  E) Rs. 3600
The greatest profit is possible only if the cost price of the books are minimum and selling prices are maximum.   Let lowest cost price of the 12 books = 125*12 = Rs. 1,500   Maximum selling price of 12 books = 420 *12 = Rs. 5,040   So, maximum profit = 5040 - 1500 = Rs. 3,540   ANSWER : OPTION Rs. 3540
<result>B</result>
If books bought at prices ranging from Rs. 125 to Rs. 350 are sold at prices ranging from Rs. 170 to Rs 420, what is the greatest possible profit that might be made in selling 12 books ?