casino royale. fair dice game shooter wins … fixed dice game modesty wins …
TRANSCRIPT
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Casino RoyaleCasino Royale
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Fair Dice GameFair Dice GameShooter wins …Shooter wins …
FAIRShooter 1 2 3 4 5 6
1 0.000 0.000 0.333 0.400 0.455 1.0002 0.000 0.333 0.400 0.455 1.000 0.4553 0.333 0.400 0.455 1.000 0.455 0.4004 0.400 0.455 1.000 0.455 0.400 0.3335 0.455 1.000 0.455 0.400 0.333 1.0006 1.000 0.455 0.400 0.333 1.000 0.000
Shooter Win = 49.3%
Bank
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Fixed Dice GameFixed Dice GameModesty wins …Modesty wins …
FIX ModestyModesty 1 2 3 4 5 6 Win
1 0 0 0.5 0.5 0.5 1 0.4172 0 0.5 0.5 0.5 1 0.5 0.5003 0.5 0.5 0.5 1 0.5 0.5 0.5834 0.5 0.5 1 0.5 0.5 0.5 0.5835 0.5 1 0.5 0.5 0.5 1 0.6676 1 0.5 0.5 0.5 1 0 0.583
Modesty Max Win = 66.7%
Lisa
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Lisa strikes backLisa strikes back
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pnppW
n
p
)1(1
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facesother ofnumber
die sLisa'on 2 ofy probabilit
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Lisa’s worst caseLisa’s worst case
10
110
Wp
Wpn
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)1(1
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Lisa’s 2Lisa’s 2ndnd worst case worst case
75.00
12)1(21
)1(1
5.0
2
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Lisa’s best caseLisa’s best case
950
31
)1(4
31
2
Wdp
dW
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Lisa’s edgeLisa’s edge
Hence, if Lisa’s die shows 2 one third of the time and shows 1, 3, 4 and 5 each one sixth of the time, then
Modesty wins 5/9 (55.6%) of the time
But Lisa is paid 1.5 times for each win
Therefore, Lisa’s margin per game is+1/9 (11.1%) of the stake
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Lisa’s Casino adviceLisa’s Casino advice
Don’t go into a casino thinking it’s a way of making money
Treat it as entertainment which you have to pay for
Pick games with low house odds
Set yourself limits on how much you are prepared to lose and win!