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 Russian Roulette (Posted on 2010-06-08)
Eight men, including Colonel Mustard, sit at a round table, for a modified game of Russian roulette. They are using a six chamber revolver which has been loaded with 5 bullets.

The game begins by one of the men reaching into a hat, and randomly drawing the name of the first player.

If the first player survives his turn, the gun is handed to his adjacent clockwise neighbor, and his name is immediately returned to the hat.

If the first player loses, his name is thrown away, and the men pull from the hat, and choose the name of the next player.

The game is continued in such a way until either all five bullets have fired, OR a player survives his turn, but no longer has an adjacent clockwise neighbor to pass the gun to.

What is the probability that the Colonel will survive the game?

(Note that the chamber is spun every time a player takes his turn).

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 Somebody must die Comment 12 of 12 |
Ed:

The probability that they all survive is 0.  If 8 players in a row fail to be killed, then the first player gets a second try.

Steve

 Posted by Steve Herman on 2010-06-10 16:57:20

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