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

[EX Q]: Problem: the present ratio of students to teachers at a certain school is 30 to 1 . if the student enrollment were to increase by 50 students and the number of teachers were to increase by 5 , the ratio of students to teachers would then be 25 to 1 . what is the present number of teachers ? 
Options: a ) 5 , b ) 8 , c ) 10 , d ) 12 , e ) 15
[EX A]: e

[EX Q]: Problem: how many factors of 2475 are odd numbers greater than 1 ? 
Options: a ) 3 , b ) 4 , c ) 17 , d ) 6 , e ) 7
[EX A]: c

[EX Q]: Problem: the compound ratio of 2 / 3 , 6 / 7 , 1 / 5 and 1 / 8 is given by ? 
Options: a ) 7 / 98 , b ) 1 / 48 , c ) 1 / 98 , d ) 3 / 350 , e ) 1 / 68
[EX A]:
d