<PRE><B>Question 724280</B>
If we inspect envelopes by drawing 4 of them without replacement from every lot of 100, what is the probability of getting 4 clean envelopes although 3% of them contain spots?
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# of ways to succeed: 97C4
# of possible results: 100C4
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P(4 clean) = 97C4/100C4 = 0.8836
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Cheers,
Stan H.
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