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

[EX Q]: Problem: in a forest 10 rabbits were caught , tagged with electronic markers , then released . a month later , 10 rabbits were captured in the same forest . of these 10 rabbits , it was found that 2 had been tagged with the electronic markers . if the percentage of tagged rabbits in the second sample approximates the percentage of tagged rabbits in the forest , and if no rabbits had either left or entered the forest over the preceding month , what is the approximate number of rabbits in the forest ?
[EX A]: 50

[EX Q]: Problem: . 005 / ? = . 01
[EX A]: . 5

[EX Q]: Problem: divide $ 1000 among a , b in the ratio 1 : 3 . how many $ that a get ?
[EX A]:
$ 250