<PRE><B>Question 804859</B>
A researcher wants to conduct a genetic study using 12 randomly-selected volunteers. He has a group of 24 volunteers to choose from. 12 are males and 12 are females. What is the probability that the randomly-selected group will be all male OR all female?
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# of ways to succeed:: 12C12 + 12C12 = 2
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# of possible groups of 12:: 24C2 = 276
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P(all male or all female) = 2/276 = 1/138
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Cheers,
Stan H.
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