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

[EX Q]: Problem: 5 % of men have unlisted phone numbers and 4 % of women have unlisted phone numbers . population ratio of men : women in the city of gpuzzles is 4 : 3 . if we select randomly 100 people from the phone directory , can you tell us how many people selected will definitely have unlisted phone numbers ? 
Options: a ) 0 % , b ) 1 % , c ) 2 % , d ) 3 % , e ) 4 %
[EX A]: a

[EX Q]: Problem: in a group of 28 junior high school students , 7 take french , 10 take spanish , and 2 take both languages . the students taking both french and spanish are not counted with the 7 taking french or the 10 taking spanish . how many students are not taking either french or spanish ? 
Options: a ) 7 , b ) 6 , c ) 9 , d ) 4 , e ) 8
[EX A]: c

[EX Q]: Problem: an alloy of zinc and copper contains the metals in the ratio 5 : 3 . the quantity of zinc to be added to 16 kg of the alloy so that the ratio of the metal may be 3 : 1 is : 
Options: a ) 2 , b ) 4 , c ) 8 , d ) 3 , e ) 1
[EX A]:
c