# math

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A bag contains 7 blue marbles, 5 red marbles, and 9 green marbles. A marble is taken at random from the bag. What is the probability that the marble is blue or red? Please type in your answer as a fraction.

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Either-or relationships require adding the probabilities of the individual events.

7/21 + 5/21 = ?

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12/21

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how many kinds of lunches are being served

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7983

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