Question 1156069
both are red, the red tree with (5/20) for the first and (4/19) for the second or 1/18 altogether
one is white and the other is blue. 
WB is 7/20*8/19
BW is 8/20*7/19
that total is 112/380 with probability 0.2947
same color is RR or 1/18 or 0.0556
WW which is (7/20),(6/19)=42/380 or 21/190 or 0.1105
BB which is (8/20)(7/19)=56/380=14/95 or 0.1474