The task is to generate the correct answer for a given math problem.

Problem: find the sum the difference between the compound and s . i . on a certain sum of money for 5 years at 20 % per annum is rs . 75 of money ?
1875

Problem: company c sells a line of 20 products with an average retail price of $ 1,200 . if none of these products sells for less than $ 400 , and exactly 10 of the products sell for less than $ 1,000 , what is the greatest possible selling price of the most expensive product ?
11000

Problem: when 732 is subtracted form the square of a number , the answer that is obtained is 5280 . what is the number ?

103', 'c ) 286', 'd ) 122', 'e ) 102'