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15 June, 05:21

A jar contains three red marbles and five green marbles. A marble is drawn at random and not replaced. A second marble is then drawn from the jar. Find the probability that the first marble is red and the second marble is green.

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  1. 15 June, 05:48
    0
    P (red then green) = 5/8 * 3/7 = 15/56

    Step-by-step explanation: Since this is a logical "and" case, we have to multiply the separate events' probabilities ... thus P (red then green) = 5/8 * 3/7 = 15/56
  2. 15 June, 05:51
    0
    3/28

    Step-by-step explanation:

    3 red + 5 green = 8 marbles in the jar

    1st marble:

    P (red) = number of red / total = 3/8

    We keep the marble

    2 red + 5 green = 7 marbles in the jar

    P (green) = number of green / total = 2/7

    P (red, keep, green) = P (red) * P (green) = 3/8*2/7 = 6/56 = 3/28
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