In the game of Russian roulette, one inserts a single cartridge into the drum of a revolver, leaving the other five chambers of the drum empty. One then spins the drum, aims at one’s head, and pulls the trigger.
a. What is the probability of being still alive after playing the game N times?
b. What is the probability of surviving (N-1) turns in this game and then being shot the Nth time one pulls the trigger?
c. What is the mean number of times a player gets the opportunity of pulling the trigger in this game?
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