GRE Question of the Day (January 23)

Frank is organizing a charity event in an effort to raise money to build a neigh­borhood park. The park will cost $1,200 to build. Each person attending the event will donate $300, less $20 for each person who attends the event. Thus, for example, if 3 people attend the event, each person will donate $300 - $20(3) = $240. What is the minimum number of people who must attend the event in order to raise enough money to build the park?

A. 4
B. 5
C. 6
D. 8
E. Frank cannot raise enough money at this charity event to build the park.