<PRE><B>Question 1135130</B>
One can make a tree diagram and determine that 
RR is 2/9
RB is 1.5/9
RY is 1/9
BR is 1.5/9
BB is .6/9
BY is .6/9
YR is 1/10
YB is 6/100
YY is 4/100
Those do add to 1.00
So, if the second is red 10/100+15/90+20/90 or 35/90 + 10/100 or 440/900,
the first one was yellow is 10/100 or 90/900
The answer is 90/440 or 0.2045
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