The author purchased a slot machine configured so that there is a 1/2000 probability of winning the jackpot on?
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The author purchased a slot machine configured so that there is a 1/2000 probability of winning the jackpot on any individual trial. Although no one would seriously consider tricking the author, suppose that a guest claims that she played the slot machine 5 times and hit the jackpot twice. Find the probability of exactly 2 jackpots in 5 trials.
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Answer:
Probability questions are always counting problems. Treat each of 5 trials as a separate probability. P = (p. of winning) * (p. of winning) * (p. of losing) * (p. of losing) * (p. of losing) P = (1/2000) * (1/2000) * (1999/2000) * (1999/2000) * (1999/2000) P = do the math yourself.
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