Step 1 :Calculate the total number of marbles in the bag: \( 8 + 3 + 2 = 13 \)
Step 2 :Calculate the probability of drawing the first blue marble: \( \frac{3}{13} \)
Step 3 :Calculate the probability of drawing the second blue marble, given that the first one was already drawn: \( \frac{2}{12} \)
Step 4 :Calculate the compound probability of drawing two blue marbles: \( \frac{3}{13} \times \frac{2}{12} \)
Step 5 :Simplify the compound probability: \( \frac{3}{13} \times \frac{1}{6} = \frac{1}{26} \)
Step 6 :Final Answer: \(\boxed{\frac{1}{26}}\)