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  3. ajar contains 5 red marbles numbered 1 to 5 and 7

Ajar contains 5 red marbles numbered 1 to 5 and 7 blue marbles numbered 1...

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Ajar contains 5 red marbles numbered 1 to 5 and 7 blue marbles numbered 1 to 7 Find the following probabilities Round solutions to three decimal places if necessary a A marble is chosen at random If you re told the marble is red what is the probability that it has the number 3 on it P 3 red 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 P red 1 1

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