The first dozen covers numbers 1-12, the second covers 13-24, and the third covers 25-36. On a table, you'll find this bet located in-between the even money bets and the inside numbers. Just like a column bet, a single dozen will payout at 2 to 1.
Say a single-number bet has a 35:1 payout, and you betR$1. If you win, you'll get your money back plusR$35. Another example: If you win aR$100 bet (for a 35:1 payout), you get a total of $3,600 ($3,500 profit plus theR$100 you initially bet).
One of the most important tips you could consider when playing roulette as a casino newbie is sticking to the table minimum and focusing on only playing the outside bets. Bet on either black or red for every new spin and you will enjoy a 1:1 payout while covering 18/38 potential combos.
This means that you cannot predict the exact number where the ball will land. But you only need to know which area of the wheel the ball will land and you can gain a massive advantage over the casino more than 40%.