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

[EX Q]: Problem: two pipes a and b can separately fill a cistern in 60 minutes and 75 minutes respectively . there is a third pipe in the bottom of the cistern to empty it . if all the three pipes are simultaneously opened , then the cistern is full in 50 minutes . in how much time , the third pipe alone can empty the cistern ?
[EX A]: 100 min

[EX Q]: Problem: solve the equation for x : 6 x - 47 + 3 x = 4 + 9 - x
[EX A]:

[EX Q]: Problem: 3 candidates contested in an election and received 4136 , 7636 , 11628 votes respectively . what is the percentage of the total votes did the winning candidate get ?
[EX A]:
50 %