If books bought at prices ranging from Rs. 90 to Rs. 190 are sold at prices ranging from Rs. 120 to Rs 260, what is the greatest possible profit that might be made in selling 21 books ?
Choose the correct choice from the following
A) Rs. 2500 B) Rs. 3000 C) Rs. 3570 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 21 books = 90*21 = Rs. 1,890   Maximum selling price of 21 books = 260 *21 = Rs. 5,460   So, maximum profit = 5460 - 1890 = Rs. 3,570   ANSWER : OPTION Rs. 3570
<result>C</result>
If books bought at prices ranging from Rs. 90 to Rs. 190 are sold at prices ranging from Rs. 120 to Rs 260, what is the greatest possible profit that might be made in selling 21 books ?