A bag that contains 7 red marbles, 8 blue marbles, and 5 green marbles. Mara randomly chose a marble, then she put it back and randomly chose another marble. What is the probability that she chose 2 blue marbles? Write your answer as a decimal.
So the probability she choses a blue marble on the first draw is 8/20 or 2/5 and since she replaces it so the second is 8/20 (2/5) again. Therefore, he chances of choosing 2 blue marbles is .16 or 16%.
