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Mathematics 11 Online
OpenStudy (anonymous):

Bailey decorates a dance hall with balloons. A box of balloons contains 20 red, 18 blue, and 12 white balloons. Bailey randomly chooses a balloon without looking. What is the probability that he chooses a blue or a white balloon?

OpenStudy (briggles1999):

add them all together and than add only blue and white answer is 30/50

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