SOLUTION: In a survey, 63% of Americans said they own an answering machine. If 14 americans are selected at random, find the probablity that excatly 9 own an answering machine.

Question 130786This question is from textbook Statistics
: In a survey, 63% of Americans said they own an answering machine. If 14 americans are selected at random, find the probablity that excatly 9 own an answering machine. This question is from textbook Statistics

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a survey, 63% of Americans said they own an answering machine. If 14 americans are selected at random, find the probablity that excatly 9 own an answering machine.
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P(x = 9) 14C9*(0.63)^9(0.37)^5 = 0.217..
Cheers,
Stan H.
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