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Urn A contains 9 red balls and 11 white balls. Urn B contains 12 red balls and 3 white balls. A person is to roll a single fair die. If the result is a one or a two, then (s)he is to randomly select a ball from urn A. Otherwise (s)he is to randomly select a ball from urn B. The probability of obtaining a red ball is |
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Answer» Urn A contains 9 red balls and 11 white balls. Urn B contains 12 red balls and 3 white balls. A person is to roll a single fair die. If the result is a one or a two, then (s)he is to randomly select a ball from urn A. Otherwise (s)he is to randomly select a ball from urn B. The probability of obtaining a red ball is |
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