The difference between the compound interest and simple interest on a certain sum at 20% per annum for 2years is $500. Find the sum?	Choices.
A) $10000  B) $50000  C) $15200  D) $12500  E) $15000
Let the sum be $x   C.I. = x(1+20/100)^2 - x = 35x/100   S.I. = (X*20*2)/100 = 2x/5   C.I.- S.I. = (35x/100)-(2x/5) = 5x/100   5x/100 = 500   x = 10000   $10000nswer is $10000
<result>A</result>
The difference between the compound interest and simple interest on a certain sum at 20% per annum for 2years is $500. Find the sum?