At what rate percent per annum will the simple interest on a sum of money be 7/5 of the amount in 10 years? Pick:
A) 4 %  B) 7 %  C) 9 %  D) 3 %  E) 14 %

Rationale: "let sum = x . then , s . i . = 7 x / 5 , time = 10 years . rate = ( 100 * 7 x ) / ( x * 5 * 10 ) = 14 % answer : e"
Answer: E