help with the quatloos casino gambling maths please...

[plu]

Hi

I am a fan of the quatloos casino gambling page (https://www.quatloos.com/quatloosia-goo ... amble2.htm) - it shows clearly the madness of gambling. I was going to share it - but I can't get my head around the maths - my bad probably. Quote:

"Your chances of leaving the Roulette table a winner are determined by calculating your Payout Percentage to the power of the Number of Wins You Need to Get Ahead. Thus,

Behind 1 Bet 89.48% 89.48%
Behind 2 Bets 89.48% x 89.48% 80.07%
Behind 3 Bets 89.48%^3rd 51.33%
Behind 4 Bets 89.48%^4th 6.94%
Behind 5 Bets 89.48%^5th 0.00%

What this means is that on your first spin you have a 89.48% chance of walking away a winner. If you lose that spin, you have a 80.07% chance of walking away even, but after getting down 3 bets only a 51.33% chance of walking away a winner. If you are down four betting units, you have a small 6.94% chance of beating the House, and after you are down 5 bets you are toast (statistically you can't win).Since the House's 5.26% advantage means that it should win an "extra" over you ever 19 spins, this means that by at least the 95th spin (19 x 5), the House knows you will be a loser."

But 89.48%^5 is 57.3 The quatloos calculation works on the "Behind 2 bets" example, but "Behind3 bets" is 71%, not 51(?)

Any help gratefully received!

[wserra]

That was written a long time ago, and at this point I couldn't even tell you who wrote it. Sorry. As you can tell from the rest of the board, that is not what we do.