Fruit Machine Chat

Is the %age on quiz machines worked out by the unit on a whole or by the individual games? Say the payout is 30%, and Pub Quiz and Hot Property have been muntered down to 5% current payout. If a pay is due and I picked Pub Quiz and won on it, would Hot Property still be willing to cough up or would that be my lot?
Cheers all
PS intelligence level=Average

all games have discrete banks but share the same hopper.