More numbers don't mean necessarily betting more money\n\n The most common is that when you bet few numbers you are less exposed to the house edge than if you played many numbers. Practically this argument has some merit, because usually when you bet few numbers your total bet value is lower than when you bet many numbers.
In the game of roulette, a player can place aR$5 bet on the number 25 and have a 1/38 probability of winning. If the metal ball lands on 25, the player gets to keep theR$5 paid to play the game and the player is awarded in additionalR$175. Otherwise, the player is awarded nothing and the casino takes the playerR$5.