There is a game where it cost $2 to play. the winner get $6 for making a purple (2/9 chance of making a purple). suppose 36 people play the game, how much money do you expect the school to PAY OUT in prizes?
36 people paly @ $2 ea = 72 dollars in
2/9 x 36 will win $6 2/9 x 36 x 6 = $48 payout ....Total NET gain of $24 overall