<PRE><B>Question 730820</B>
 A grab bag contains 10 $1 prizes, 6 $5 prizes, and 5 $20 prizes. Three prizes are chosen at random. Find the probability that exactly 2 $20 prizes are chosen? 
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There are 21 prizes.
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# of ways to succeed: 5C2*11C1 = 10*11 = 110
# of possible outcomes: 21C3 = 1330
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Probability of selecting 2 $20 prizes when choosing 3: 110/1330 = 11/133
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Cheers,
Stan H. </PRE>