Buy in requirements

[cwar]

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c) [0.35/0.65]^15=0.00927% You'll never go broke


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The reason I find calculations like this fairly unnecessary is that in a real life situation someone with a mathematical ROR of 5% could in reality have a much lower ROR than someone with a mathematically figured ROR of .1% even assuming that winrate was constant and both players never tiled. If you have a 30 buy in roll and move down whenever you reach 20 buy ins (this is approximately what I do) assuming a constant winrate of 55% your ROR should be lower than the lowest ROR you provided with the 65% winrate.