Mathematics, 02.02.2021 16:00 mem81

There is a bag filled with 5 blue, 4 red and 3 green marbles. A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting 2 the same colour?

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There is a bag filled with 5 blue, 4 red and 3 green marbles. A marble is taken at random from the...