SOLUTION: If there are 8 women and 4 men in a room and they put their names in a hat and then 3 names are selected at random, what is the probability of getting two men and one woman?

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Question 1162074: If there are 8 women and 4 men in a room and they put their names in a hat and then 3 names are selected at random, what is the probability of getting two men and one woman?
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
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The probability is  P = %28C%5B8%5D%5E1%2AC%5B4%5D%5E2%29%2FC%5B12%5D%5E3     (*).


The denominator  of the formula  C%5B12%5D%5E3 is the number of all possible triples to form of 12 = 8 + 4 persons.


It is equal to  C%5B12%5D%5E3 = %2812%2A11%2A10%29%2F%281%2A2%2A3%29 = 220.


The numerator of the formula  (*)  is the number to form the triples, formed of 1 woman and 2 men.


So, the answer is  P = %288%2A6%29%2F220 = 48%2F220 = 12%2F55.