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

[EX Q]: Problem: 210 students were asked in a survey if they preferred windows or mac brand computers . 60 students claimed that they preferred mac to windows brand computers . one third as many of the students who preferred mac to windows , equally preferred both brands . 90 of the students had no preference . how many of the students in the survey preferred windows to mac brand computers ? 
Options: a ) 25 , b ) 40 , c ) 50 , d ) 60 , e ) 75
[EX A]: b

[EX Q]: Problem: log 3 n + log 12 n what is 3 digit number n that will be whole number 
Options: a ) 6291 , b ) 7292 , c ) 1728 , d ) 1929 , e ) 1727
[EX A]: c

[EX Q]: Problem: each factor of 210 is inscribed on its own plastic ball , and all of the balls are placed in a jar . if a ball is randomly selected from the jar , what is the probability that the ball is inscribed with a multiple of 45 ? 
Options: a ) 1 / 16 , b ) 5 / 42 , c ) 1 / 8 , d ) 3 / 16 , e ) 1 / 4
[EX A]:
b