In this task, you need to provide the correct option for a given problem from the provided options.

[EX Q]: Problem: in a group of 90 students , 36 are taking history , and 32 are taking statistics . if 57 students are taking history or statistics or both , then how many students are taking history but not statistics ?
Options: a ) 9 , b ) 19 , c ) 25 , d ) 27 , e ) 31
[EX A]: c

[EX Q]: Problem: sachin is younger than rahul by 18 years . if the ratio of their ages is 7 : 9 , find the age of sachin
Options: a ) 24.5 , b ) 63 , c ) 65 , d ) 36 , e ) 24.19
[EX A]: b

[EX Q]: Problem: he ratio between the sale price and the cost price of an article is 4 : 7 . what is the ratio between the profit and the cost price of that article ?
Options: a ) 2 : 6 , b ) 3 : 7 , c ) 3 : 8 , d ) 2 : 1 , e ) 8 : 3
[EX A]:
b