Question 1076564
18 red, 18 black, 2 green (0 and 00).  Bet is on red with payout $1.00 for a $1.00 bet.

The box model views the probability problem as if you were drawing tickets from a box.
Courtesy of  http://ingrimayne.com/statistics/box_model_text.htm  
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The box model has  18 tickets showing $1.00 and 20 tickets showing -$1.00.
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The 18 tickets showing $1.00 correspond to winning (red number comes up)
The 20 tickets showing -$1.00 correspond to the chances of losing (black or green comes up)