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

Problem: in what ratio should a 20 % methyl alcohol solution be mixed with a 50 % methyl alcohol solution so that the resultant solution has 40 % methyl alcohol in it ? 
Options: a ) 1 : 3 , b ) 1 : 2 , c ) 2 : 3 , d ) 2 : 1 , e ) 3 : 1
b

Problem: log 3 n + log 15 n what is 3 digit number n that will be whole number 
Options: a ) 3375 , b ) 7292 , c ) 8291 , d ) 3929 , e ) 2727
a

Problem: the h . c . f . of two numbers is 30 and the other two factors of their l . c . m . are 25 and 24 . the larger of the two numbers is 
Options: a ) 276 , b ) 799 , c ) 712 , d ) 750 , e ) none

d