document.write( "Question 848618: #1) A batch of twelve batteries has two that are defective. Two are picked at random from the lot. What is the probability that at least one is defective? \n" ); document.write( "

Algebra.Com's Answer #511214 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "P(defective) 2/12 = 1/6  , P(not defective) = 5/6
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document.write( "Two picked
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document.write( "P(at least one defective) = 1 -P(none defective) = 1-(5/6)^2\r
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document.write( "Note: The probability of x successes in n trials is: 
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document.write( "P = nCx*  where p and q are the probabilities of success and failure respectively. 
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document.write( "In this case p = 1/6   & q = 5/6.   n = 2
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