The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: jack and jill are marathon runners . jack can finish a marathon ( 42 km ) in 7 hours and jill can run a marathon in 4.2 hours . what is the ratio of their average running speed ? ( jack : jill )
[EX A]: 5 / 5

[EX Q]: Problem: if one - third of one - fourth of a number is 18 , then 3 - tenth of that number is : a . 35
[EX A]: 64.8

[EX Q]: Problem: in the youth summer village there are 175 people , 100 of them are not working , 75 of them have families and 125 of them like to sing in the shower . what is the largest possible number of people in the village , which are working , that do n ' t have families and that are singing in the shower ?
[EX A]:
75