It's friday night. you already have a ticket to a concert, which cost you $30. a friend invites you to go out for a game of paintball instead. admission would cost you $25, and you think you'd get $25 worth of enjoyment out of it. your concert ticket is nonrefundable.

Respuesta :

sence this riddle does not list a date he can still watch the concert another day and play paintball with his freind