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OpenStudy (anonymous):
Mary Has a bag that contains 4 green marbles, 8 red marbles, and 9 blue marbles mary draws a marble from the bag, what is the probability that she will draw a green or blue marble?
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OpenStudy (anonymous):
picture of problem.
OpenStudy (anonymous):
number of green or blues divided by total number
OpenStudy (anonymous):
Total balls is 21 P(green+blue)=4/21+9/13=13/21
OpenStudy (anonymous):
thanks
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