Problem

Compound Probability Unique ID: 0770 Score: $1 / 10$ Penalty: none Question Watch Video Show Examples A bag contains 8 red marbles, 3 blue marbles and 2 green marbles. If two marbles are drawn out of the bag, what is the exact probability that both marbles drawn will be blue? Answer Attempt 1 out of 2 Submit Answer

Solution

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: \(\boxed{\frac{1}{26}}\)

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