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Mathematics 19 Online
OpenStudy (purplemexican):

Each of the numbers from 1 through 30 is written on a table tennis ball and placed in a wire cage. Each of the numbers 20 through 45 is written on a table tennis ball and placed in a different wire cage. One ball is chosen at random from each spinning cage. Which of the following best describes: P(exactly one is a 30)

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