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thoconnery

  • 3 years ago

a bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a red marble, replacing it, and then picking a black marble?

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  1. sauravshakya
    • 3 years ago
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    P(R and B) = P(R) * P(B)

  2. sauravshakya
    • 3 years ago
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    Can u find P(R) ?

  3. thoconnery
    • 3 years ago
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    uhh...i dont exactly know what P(R) is.

  4. sauravshakya
    • 3 years ago
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    Probability of picking a red marble

  5. thoconnery
    • 3 years ago
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    5/15 so 1/3

  6. sauravshakya
    • 3 years ago
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    Yes. Now find P(B)

  7. thoconnery
    • 3 years ago
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    4/15

  8. sauravshakya
    • 3 years ago
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    Great Now, find P(R and B)

  9. thoconnery
    • 3 years ago
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    9/15...3/5

  10. sauravshakya
    • 3 years ago
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    P(R and B) =P(R) * P(B) = 1/3 *4/15 =?

  11. thoconnery
    • 3 years ago
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    4/45 ? i think

  12. sauravshakya
    • 3 years ago
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    \[\checkmark\]

  13. thoconnery
    • 3 years ago
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    thank you so much!!

  14. sauravshakya
    • 3 years ago
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    welcome

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