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

[EX Q]: Problem: in a college , the ratio of the number of boys to girls is 8 : 5 . if there are 300 girls , the total number of students in the college is
Options: a ) 420 , b ) 520 , c ) 620 , d ) 780 , e ) 820
[EX A]: d

[EX Q]: Problem: the ratio of three numbers is 1 : 2 : 3 and the sum of their squares is 2016 . the sum of the numbers is ?
Options: a ) a ) 10 , b ) b ) 12 , c ) c ) 15 , d ) d ) 14 , e ) e ) 9
[EX A]: b

[EX Q]: Problem: three numbers are in the ratio of 2 : 3 : 4 and their l . c . m . is 288 . what is their h . c . f . ?
Options: a ) 18 , b ) 24 , c ) 36 , d ) 42 , e ) 48
[EX A]:
b