The number of marbles of different colors stored in a hat is listed below:
1 red marble
8 green marbles
9 blue marbles
Without looking in the hat, Ray takes out a marble at random. He replaces the marble and then takes out another marble from the hat. What is the probability that Ray takes out a blue marble in both draws?
1 /9
1 / 8
1 / 4
1/2

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1/2

Add the probabilities together, what do you get?

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