<PRE><B>Question 935215</B>
a comeetie contains 8members is to be chossen for 9teachers and 4students.How many ways can be done if comeetie contains exactly 3students.
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# of ways to succeed: 4C2*9C6 = 6*84 - 504
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# of possible groups of 8:: 13C8 = 1287
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P(condition) = 504/1287 = 0.3916
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Cheers,
Stan H.
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