<PRE><B>Question 419171</B>
Manufacturer reliability ratings indicate that 9% of flux capacitors will fail at their scheduled lifetime of 2 years.
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a.Given a random sample of 10 2-year-old flux capacitors, what is the probability that 3 will have failed?
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Binomial Problem with n = 10 and p = 0.09
P(x = 3) = (0.09)^3
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b.Suppose you do find that 3 have failed. 
What inference do you make? 
Answer for yourself: Is that probability exceptional or 
to be expected.
Cheers,
Stan H.</PRE>