Mathematics, 28.04.2021 01:00, ten55

There is a bag filled with 5 blue and 4 red 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 of the same colour?

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