Mathematics, 07.07.2020 05:01, arteria3

What are the chances of choosing a black marker out of a bag containing 3 red markers, 5 blue markers, 3 yellow markers, and 4 black markers? What is the probability of choosing two black markers if the first marker is put back before the second is drawn?

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What are the chances of choosing a black marker out of a bag containing 3 red markers, 5 blue marker...