instruction:
The task is to generate the correct answer for a given math problem.
question:
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 ?
answer:
100 min

question:
Problem: a snooker tournament charges $ 45.00 for vip seats and $ 20.00 for general admission ( " regular " seats ) . on a certain night , a total of 320 tickets were sold , for a total cost of $ 7500 . how many fewer tickets were sold that night for vip seats than for general admission seats ?
answer:
276

question:
Problem: if 40 % of ( x - y ) = 30 % of ( x + y ) then what percent of x is y ?
answer:
14 %