In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: how many halves are there in 9 - fourth ? 
Options: a ) 8 , b ) 4.5 , c ) 3.2 , d ) 7 , e ) 3
[A]: b


[Q]: Problem: a batsman makes a score of 100 runs in the 11 th inning and thus increases his average by 5 . find his average after 11 th inning . 
Options: a ) 40 , b ) 50 , c ) 62 , d ) 45 , e ) 56
[A]: b


[Q]: Problem: instead of multiplying a number by 2 , the number is divided by 10 . what is the percentage of error obtained ? 
Options: a ) 94 % , b ) 92 % , c ) 95 % , d ) 93 % , e ) 97 %
[A]:
c