Answer:
Step-by-step explanation:
Total marble = 9
No. Of Green n(G) = 2
No. Of Red n(R) = 4
No. Of Blue n(B) = 3
Prob(1st Blue) = 3/9 = 1/3
Now there are 8 marbles left
Prob(2nd Green) = 2/8 = 1/4
Prob(1st Blue and 2nd Green) will be = 1/3 × 1/4 = 1/12