<PRE><B>Question 755703</B>
 a child has a bucket containing 6 blue blocks, 9 green blocks, and 10 red blocks. The child draws two blocks from the bucket, one after the other, without replacement. What is the probability that one block is blue and the other is red?
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# of blue/red pairs: 6*10 = 60
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# of random pairs: 25C2 
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P(blue/red pair) = 60/25C2 = 60/300 = 1/5
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Cheers,
Stan H.</PRE>