Question 1197318
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Hi 
Binomial Probability:  n = 30, p = 3/30 = .1
what then is the probability that the inspector's sample contains:
Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus
P( x = 0) = .0424
0r
{{{P (x)= highlight_green(nCx)(p^x)(q)^(n-x) }}} 
P( x = 0) = 1(.1^0)(.9^30) = .0424
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n = 3, p = .8
P(x = 0) = .008
P(at least one) = 1 - P(0) == 1 - .008 = .992
Wish You the Best in your Studies.
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