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A jar contains 8 red marbles, numbered 1 to 8, and 11 blue marbles numbered...

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Statistics

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A jar contains 8 red marbles, numbered 1 to 8, and 11 blue marbles numbered 1 to 11.a) A marble is chosen at random. If you're told the marble is red, what is the probability that it has the number 7 on it?b) The first marble is replaced, and another marble is chosen at random. If you're told the marble has the number 1 on it, what is the probability the marble is red?

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