Question 248270: What is the probablility of picking a chosen whole number out of 1000 in 10 guesses
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! What is the probablility of picking a chosen whole number out of 1000 in 10 guesses
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Assuming the selections are independent,
P(success) = 1/1000
P(failure) = 999/1000
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Your Problem:
Binomial with n=10, p = 1/1000, x=1
P(success in 10 tries) = 1 - P(no success in 10 tries)
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P(no success in 10 tries) = (999/1000)^10 = 0.9900
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P(at least one success in 10 tries) = 1-0.99 = 0.01
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Cheers,
Stan H.
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