Mathematics, 04.10.2020 23:01, officialkk

there are 4 red and 8 blue marbles in a bag. mark draws a blue marble out of a bag and does not replace it. mark draws a second blue marble out of the bag and does not replace it. what is the probability that the next marble he draws will also be blue?

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there are 4 red and 8 blue marbles in a bag. mark draws a blue marble out of a bag and does not repl...