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A sample of 4 different calculators is randomly selected from a group containing 16 that are defective and 38 that have no defects. Find the probability that at least one of the calculators is defective.
 Jun 26, 2012

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 #1
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n = 4
p = 16/(16+38)
P(X>=1) = 1 - P (X<1) = 1 - P (X=0) = 1 - (16/(16+38))^4
 Jul 6, 2012
 #2
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Anon:

n = 4
p = 16/(16+38)
P(X>=1) = 1 - P (X<1) = 1 - P (X=0) = 1 - (16/(16+38))^4


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 Jul 13, 2012

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