Plz help!! Roulette Probability? - XP Math - Forums

 XP Math - Forums Plz help!! Roulette Probability?

 07-31-2007 #1 Lower W Guest   Posts: n/a Plz help!! Roulette Probability? Can people guide me through this one:"When betting \$1 on the number 7 in roulette, there is a probability of 1/38 of winning, and a win results in a net profit of \$35. What is the average return for every \$1 that is bet?"thanks a million for any help!!
 07-31-2007 #2 fenchurchthesane Guest   Posts: n/a I'm gonna assume that means you add up all the returns and divide by the number of possibilities. So because you lose a dollar usually and gain 35 dollars every 38 times, it would be ((37 * -1) + 35) / 38, or -5 cents. Therefore, don't play roulette. Especially not the Russian kind.

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