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

[Q]: Problem: find the compound ratio of ( 2 : 3 ) , ( 6 : 11 ) and ( 11 : 5 ) is 
Options: a ) 3 : 2 , b ) 2 : 1 , c ) 1 : 2 , d ) 4 : 5 , e ) 2 : 3
[A]: d


[Q]: Problem: a certain bag contains 60 balls — 22 white , 18 green , 5 yellow , 6 red , and 9 purple . if a ball is to be chosen at random , what is the probability that the ball will be neither red nor purple ? 
Options: a ) 0.09 , b ) 0.15 , c ) 0.54 , d ) 0.75 , e ) 0.91
[A]: d


[Q]: Problem: how many of the positive factors of 14 are not factors of 21 ? 
Options: a ) 4 , b ) 3 , c ) 1 , d ) 2 , e ) 0
[A]:
c