Calculating the house percentage on each kind
of keno ticket is very long and complex. It first involves
calculating the odds of hitting every possible payoff combination
for that ticket. This must be multiplied against all the payoffs
offered by the house for this ticket. Finally, it is necessary
to calculate how much it would cost to play every possible
ticket of that particular type, and this cost must be compared
to the previously calculated payoff total. This process has
to be repeated for each of the fifteen possible straight tickets.
Finally, since each online-casino has its own payoff schedule,
this process would have to be repeated at each online-casino
you play in. This probabley isn't something you would try
to figure out in your head while filling out the ticket.
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