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A bag contains 5 red balls and 7 green balls . A ball is picked at random , its color is noted and it is given out . The bag is shaken and a second selection is made. A. Draw. Tree diagram to illustrate thr information. B. Calculate the probability that both balls are red

  • math - ,

    ball is not returned...

    prob(both red) = (5/12)(4/11) = 5/33

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