Assume a jar has 7 red marbles and 5 black marbles. Draw out 3 marbles with and without replacement. Find the requested probabilities.
(c) P(one red and two black marbles)
With replacement , without replacement .
(d) P(red on the first draw and black on the second draw and black on the third draw)
With replacement , without replacement .

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What does with replacement mean?

putting back in the jar

Oh. I dunno about that, but without replacement is pretty easy.

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