99% Chance to win system?

[FreeRoulette]

Hello,

Can any math minds confirm my findings for 99% on double zero roulette?

This is to bet 11 straight up numbers for 15 spins.

The probability is 1 - (numbers not up)^spins. or 1 - (27/38)^15 = 99.406%

A 15 spin progression on 11 numbers costs $3,839

Using a progression of
Bet      1      for      3      spins.
Bet      2      for      1      spins.
Bet      3      for      1      spins.
Bet      4      for      1      spins.
Bet      6      for      1      spins.
Bet      8      for      1      spins.
Bet      12      for      1      spins.
Bet      17      for      1      spins.
Bet      25      for      1      spins.
Bet      36      for      1      spins.
Bet      52      for      1      spins.
Bet      74      for      1      spins.
Bet      107      for      1      spins.

In the attached spreadsheet, you can change the number of spins to see the chance of winning.

I would use the information on the excel with a progression calculator link:://loothog.com/Systems/prog.html

Any idea of the optimal combination of
1. Number of spins
2. Win Percentage
3. Bankroll

[Steeefan2014]

Hello,

Can any math minds confirm my findings for 99% on double zero roulette?

This is to bet 11 straight up numbers for 15 spins.

The probability is 1 - (numbers not up)^spins. or 1 - (27/38)^15 = 99.406%

A 15 spin progression on 11 numbers costs $3,839

Using a progression of
Bet      1      for      3      spins.
Bet      2      for      1      spins.
Bet      3      for      1      spins.
Bet      4      for      1      spins.
Bet      6      for      1      spins.
Bet      8      for      1      spins.
Bet      12      for      1      spins.
Bet      17      for      1      spins.
Bet      25      for      1      spins.
Bet      36      for      1      spins.
Bet      52      for      1      spins.
Bet      74      for      1      spins.
Bet      107      for      1      spins.

In the attached spreadsheet, you can change the number of spins to see the chance of winning.

I would use the information on the excel with a progression calculator link:://loothog.com/Systems/prog.html

Any idea of the optimal combination of
1. Number of spins
2. Win Percentage
3. Bankroll

IMO, I don't think there is an optimal anything on that! You're right, in order for any hit to provide a profit, for 15 spins you need 3839units (in case you don't get a hit up until then). But... I don't think it's a really friendly way to play!