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A bad contains 7 red marbels and 4 blue marbles
A marble is taken from the bag and replaced
another marble is taken from the bag

Work out the probability that the two marbles are the same colour
Give your answer as a fraction


A Bad Contains 7 Red Marbels And 4 Blue Marbles A Marble Is Taken From The Bag And Replaced Another Marble Is Taken From The Bag Work Out The Probability That T class=