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: for how many integer values of n will the value of the expression 4 n + 7 be an integer greater than 1 and less than 120 ? 
Options: a ) 22 , b ) 24 , c ) 26 , d ) 28 , e ) 30
[EX A]: e

[EX Q]: Problem: each of the products produced yesterday was checked by worker x or worker y . 0.5 % of the products checked by worker x are defective and 0.8 % of the products checked by worker y are defective . if the total defective rate of all the products checked by worker x and worker y is 0.7 % , what fraction of the products was checked by worker y ? 
Options: a ) 2 / 3 , b ) 5 / 6 , c ) 7 / 8 , d ) 4 / 5 , e ) 5 / 8
[EX A]: a

[EX Q]: Problem: the average of 9 observations was 5 , that of the 1 st of 5 being 10 and that of the last 5 being 8 . what was the 5 th observation ? 
Options: a ) 45 , b ) 12 , c ) 15 , d ) 17 , e ) 18
[EX A]:
a