TASK DEFINITION: In this task, you need to provide the correct option for a given problem from the provided options.
PROBLEM: Problem: if x and y are sets of integers , x # y denotes the set of integers that belong to set x or set y , but not both . if x consists of 12 integers , y consists of 18 integers , and 6 of the integers are in both x and y , then x # y consists of how many integers ? 
Options: a ) 6 , b ) 16 , c ) 18 , d ) 30 , e ) 174

SOLUTION: c

PROBLEM: Problem: the ratio of three numbers is 4 : 2 : 5 and their sum is 121 . the second number of the three numbers is ? 
Options: a ) 22 , b ) 26 , c ) 27 , d ) 29 , e ) 30

SOLUTION: a

PROBLEM: Problem: if the ratio of two number is 6 : 7 and lcm of the number is 450 then what is the number . 
Options: a ) 11 , b ) 20 , c ) 25 , d ) 30 , e ) 35

SOLUTION:
a