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5 December, 21:17

Suppose you choose a marble from a bag containing 2 red marbles, 5 white marbles, and 3 blue marbles. You return the first marble to the bag and then choose again. Find P (red then blue)

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  1. 5 December, 22:05
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    Red: 2

    White: 5

    Blue: 3

    Total marbles: 10

    P (R, B) : (2/10) * (3/10) = 6/100 (with replacement)

    Putting the marble back in the bag

    if without replacement, not putting back in then:

    P (R, B) : (2/10) * (3/9) = 6/90
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