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

[Q]: Problem: sandy gets 3 marks for each correct sum and loses 2 marks for each incorrect sum . sandy attempts 30 sums and obtains 50 marks . how many sums did sandy get correct ?
[A]: 22


[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 ?
[A]: 50


[Q]: Problem: find the cost of fencing around a circular field of diameter 16 m at the rate of rs . 3 a meter ?
[A]:
150.84