Roulette Win Strategy

Betting 12 Numbers, 'Dozen Bet' (1/4)

Betting 12 numbers, a Dozen, has a payout 1 to 2.
The chance of winning is 1 bet is 12/37 = 32%.
The graph below shows the chance of winning after many spins. After 18 spins the chance to have had at least 1 win is 100%. However this is not relevant as after 3 spins you need more than 1 win to compensate your losses.

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