MathCurious
MathCurious
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November 27th, 2020 at 5:37:59 PM permalink
Suppose we have roulette with 37 numbers including a zero. But every time the ball lands on a zero, the payout ratio is 1:1/2. In a straight up bet with a ratio payout of 35:1. Is the house edge then 35(1/37)-1/2(1/37)-1(35/37)?
ChesterDog
ChesterDog 
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November 27th, 2020 at 7:06:17 PM permalink
Quote: MathCurious

Suppose we have roulette with 37 numbers including a zero. But every time the ball lands on a zero, the payout ratio is 1:1/2. In a straight up bet with a ratio payout of 35:1. Is the house edge then 35(1/37)-1/2(1/37)-1(35/37)?



If the player loses only half his straight up bet when the ball lands on the zero, then the player's EV would be your number: 35(1/37)-(1/2)(1/37)-1(35/37) = -1/74.

That would make the house edge on the straight up bet 1/74.
OnceDear
OnceDear
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November 27th, 2020 at 11:47:18 PM permalink
Quote: MathCurious

Suppose we have roulette with 37 numbers including a zero. But every time the ball lands on a zero, the payout ratio is 1:1/2. In a straight up bet with a ratio payout of 35:1. Is the house edge then 35(1/37)-1/2(1/37)-1(35/37)?

Sound like you are talking about the 'La Partage' or 'En Prison' rule.
The house edge of the even money bets is indeed so improved. BUT only for the even money bets where half the stake is returned on a zero result. Inside bets still have a house edge of 1/37
Psalm 25:16 Turn to me and be gracious to me, for I am lonely and afflicted. Proverbs 18:2 A fool finds no satisfaction in trying to understand, for he would rather express his own opinion.
DogHand
DogHand
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November 28th, 2020 at 5:01:34 AM permalink
Quote: MathCurious

Suppose we have roulette with 37 numbers including a zero. But every time the ball lands on a zero, the payout ratio is 1:1/2. In a straight up bet with a ratio payout of 35:1. Is the house edge then 35(1/37)-1/2(1/37)-1(35/37)?



Perhaps I am missing something, but if the "payout ratio is 1:1/2" isn't that the same as 2:1?

Dog Hand
OnceDear
OnceDear
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November 28th, 2020 at 5:14:41 AM permalink
Quote: DogHand

Perhaps I am missing something, but if the "payout ratio is 1:1/2" isn't that the same as 2:1?

Dog Hand

I think he got it the wrong way round. It's half stake returned on losing to a zero.
Psalm 25:16 Turn to me and be gracious to me, for I am lonely and afflicted. Proverbs 18:2 A fool finds no satisfaction in trying to understand, for he would rather express his own opinion.
MathCurious
MathCurious
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November 28th, 2020 at 5:35:39 PM permalink
Oh yes. I meant that if the ball lands on zero, half of your bet is returned.
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