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

[EX Q]: Problem: two trains of length 100 meters and 200 meters are 450 meters apart . they are moving towards each other on parallel tracks , at speeds of 90 km / h and 72 km / h . after how many seconds will the trains meet ?
[EX A]: 10

[EX Q]: Problem: in a village of 2,500 people , 800 people are over 70 years old and 850 people are female . it is known that 40 percent of the females are younger than 70 years old . if no one in the village is 70 years old , what is the probability that a person chosen at random is either a male or younger than 70 years old ?
[EX A]: 199 / 250

[EX Q]: Problem: if shares of two persons in profits are rs . 400 and rs . 600 then ratio of their capitals is
[EX A]:
2 : 3