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John has a bag of marbles that contains 12 red marbles, 20 green marbles, and 17 blue marbles. Homework Help ✎ If John pulls one marble out of the bag, what is the probability that it will not be red? That is, P(not red)?

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P(not red)= 37/49
You add all of the marbles together and then subtract the number of red marbles.
User WillBroadbent
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