Task: Question Answering
Input (English): Problem: a sum of money amounts to rs . 9800 after 5 years and rs . 12005 after 8 years at the same rate of simple interest . the rate of interest per annum is 
Options: a ) 15 % , b ) 12 % , c ) 8 % , d ) 7 % , e ) 5 %
Output (English): b