SOLUTION: One half of all U.S. households pay bills electronically. If seven U.S. households are randomly selected, what is the probability that exactly two pay bills electronically?
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Question 545422: One half of all U.S. households pay bills electronically. If seven U.S. households are randomly selected, what is the probability that exactly two pay bills electronically? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! One half of all U.S. households pay bills electronically. If seven U.S. households are randomly selected, what is the probability that exactly two pay bills electronically?
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Binomial Problem with n = 7 and p(pay) = 1/2
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P(x = 2) = 7C2(1/2)^7 = 21/2^7 = 21/128
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Cheers,
Stan H.
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