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

[EX Q]: Problem: find the area of trapezium whose parallel sides are 20 cm and 18 cm long , and the distance between them is 10 cm ?
[EX A]: 190 cm

[EX Q]: Problem: a number x is mistakenly divided by 10 instead of being multiplied by 10 . what is the percentage error in the result ?
[EX A]: - 99 %

[EX Q]: 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 ?
[EX A]:
276