<PRE><B>Question 62830</B>
 In A batch of 8000 clock radios 9% are defective. A sample of 6 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected? 
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8000 clocks
720 defective 
7180 not defective
Prob(none are defective)=7180C6/8000C6=0.52
Prob(at least one defective)=1-Prob none defective
=1-0.52
=0.48
Cheers,
Stan H.</PRE>