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'.

[EX Q]: Problem: how many numbers from 10 to 1000 are exactly divisible by 9 ? 
Options: a ) 100 , b ) 10 , c ) 11 , d ) 12 , e ) 14
[EX A]: a

[EX Q]: Problem: the average of 11 numbers is 60 . out of 11 numbers the average of first 6 no . is 78 , and last 6 numbers is 75 then find 6 th number ? 
Options: a ) a ) 258 , b ) b ) 65 , c ) c ) 58 , d ) d ) 62 , e ) e ) 48
[EX A]: a

[EX Q]: Problem: the avg weight of a , b & c is 84 kg . if d joins the group , the avg weight of the group becomes 80 kg . if another man e who weights is 5 kg more than d replaces a , then the avgof b , c , d & e becomes 79 kg . what is the weight of a ? 
Options: a ) 45 , b ) 65 , c ) 77 , d ) 89 , e ) 90
[EX A]:
c