Mathematics, 18.07.2019 02:00, kingyogii

There is a bag filled with 3 blue and 4 red marbles. a marble is taken at random from the bag, the colour is noted and then it is not replaced. another marble is taken at random. what is the probability of getting 2 reds ?

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