[jay_shark]

1)B=black , b=blue , r1=red 1, r2=red2

There are 4c2=6 ways to select two balls .
Bb,(Br1,Br2,br1,br2,r1r2)

Notice that only 1 in 5 is the prob. that both balls are red . Bb is ommitted from our sample space since neither of the balls are red . This means our sample space consists of 5 elements and only r1r2 satisfies the condition stated in the question .