A sum of Rs. 125000 amounts to Rs. 15500 in 4 years at the rate of simple interest. What is the rate of interest?	Choices:
A) 3%
B) 2%
C) 1%
D) 6%
E) 7%
S.I. = (15500 - 12500) = Rs. 3000\   Rate = (100 * 3000) / (12500 * 4)= 
<gadget id="calculator">(100 * 3000) / (12500 * 4)</gadget>
<output>6</output>
6%   Answer: 6%
<result>D</result>
A sum of Rs. 125000 amounts to Rs. 15500 in 4 years at the rate of simple interest. What is the rate of interest?