math

4 red marbles, 3 green, 2 yellow. you pick 2 at random.What is probability of a. 1 yellow & 1 red
b. 2 green

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  1. is the first marble picked returned before the second is picked ?
    - very important.

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  2. no

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  3. prob(yellow, then red)
    = (2/9)(4/8)
    = 1/9

    follow the same kind of reasoning for your second part

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