SOLUTION: An Easter basket of 25 plastic eggs has ten eggs that have money inside. If 7 eggs are selected at random from the basket, determine the probability that at least one of the seven

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Question 962200: An Easter basket of 25 plastic eggs has ten eggs that have money inside. If 7 eggs are selected at random from the basket, determine the probability that at least one of the seven eggs selected has money inside it?
Answer by stanbon(75887) About Me  (Show Source):
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An Easter basket of 25 plastic eggs has ten eggs that have money inside. If 7 eggs are selected at random from the basket, determine the probability that at least one of the seven eggs selected has money inside it?
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Rule:: P(at least one) = 1 - P(none)
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Binomial Problem with n = 7 and p(money)= 10/25; p(no money) = 3/5
Your Problem::
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P(x >= 1) = 1 - P(none of 7 selected has money)
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= 1 - (3/5)^7
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= 1 - 0.02799
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= 0.9720
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Cheers,
Stan H.
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