A sum of money deposited at C.I. amounts to Rs.9000 in 10 years and to Rs.9990 in 11 years. Find the rate percent? Choose the correct option:
A) 9%  B) 10%  C) 11%  D) 12%  E) 13%
9000 --- 990   100 --- ? =&gt; 11%   Answer: 11%
<result>C</result>
A sum of money deposited at C.I. amounts to Rs.9000 in 10 years and to Rs.9990 in 11 years. Find the rate percent?