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Tttaammmaannnaa

  • 3 years ago

A bag contains 4 red marbles and 5 blue marbles. What is the probability of randomly selecting a blue marble and then, without replacing it, selecting a red marble?

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  1. tcarroll010
    • 3 years ago
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    5/9 x 4/8 = 5/9 x 1/2 = 5/18 Notice how the denominator in the second factor is 8. That's because there are only 8 marbles left at that point, of which there are still 4 red ones.

  2. Tttaammmaannnaa
    • 3 years ago
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    where did you get 1/2?

  3. Tttaammmaannnaa
    • 3 years ago
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    oh wait 1/2 is 4/8 simplified, right?

  4. tcarroll010
    • 3 years ago
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    yes.

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