Question 881361
1,2,3,4,5,6,7,8 = 4 even numbers
There are 4 green on 3,4,5,7
There are 4 blue on 1,2,6,8
P(A|B) = P(A and B)/P(B)
P(green|even number) =  (1/8)/(4/8) =  1/4