A jar contains 6 red marbles, numbered 1 to 6, and 12 blue marbles numbered 1 to 12. 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 4 on it? P(4 I 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) =

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