THE ANSWER!!

If Ben plans to scare n people, then Eric plans to scare 3n people and Eugene(Yao Jin XP) plans to scare double that, 6n. Altogether, n + 3n + 6n is lesser or equal to 2005; so n is lesser or equal to 200.5. Since n is an integer, n is at most 200. Since Eric plans to scare 3n people, that's at most 600 people.

Answer= 600 people!! U cant have a 0.5 person.. hahass..

Some people will get it correct, it sure a easy Halloween question!

P.S Yawn.. When are we catching our movie, my basketball mates??