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help123please.

  • one year ago

Joe has 4 red pens, 1 green pen, 2 blue pens, and 3 black pens. What is the probability he will randomly select a black pen and then,without replacing it, randomly selecti a blue pen?

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  1. help123please.
    • one year ago
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    @AriPotta

  2. AriPotta
    • one year ago
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    OH I'M SORRY. I'M NOT GOOD WITH PROBABILITY

  3. help123please.
    • one year ago
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    ITS OK ARI

  4. RadEn
    • one year ago
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    P(Black) = 3/10 P(Blue) = 2/9 multiply of both

  5. electrokid
    • one year ago
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    event A: selecting "1" black from a total of (4+1+2+3)=10; \[P(A)={3\over10}\] event B: selecting "1" blue from the remainning "9" \[P(B)={2\over9}\] now, the events are mutually independent... \[P(A\cap B)=P(A)\times P(B)={3\over10}\times{2\over9}\]

  6. help123please.
    • one year ago
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    Oh, ok, thanks!

  7. help123please.
    • one year ago
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    IDK who to give BEST ANSWER to. LOL.

  8. electrokid
    • one year ago
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