A gambler decides to keep betting on red at roulette and


A gambler decides to keep betting on red at roulette, and stop as soon as she has won a total of five bets.

a) What is the probability that she has to make exactly 8 bets before stopping?

b) What is the probability that she has to make at least 9 bets?

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Basic Statistics: A gambler decides to keep betting on red at roulette and
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