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4. In a box of 15 marbles, 4 are green. You choose 2 at random without replacement .(a) Create a tree diagram for the 2
4. In a box of 15 marbles, 4 are green. You choose 2 at random without replacement
.(a) Create a tree diagram for the 2 draws.
(b) Create a probability model for the number of green marbles in two draws.
(c) Find the mean and the standard deviation.
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