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Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 decade ago

Probabilty Help?

If I had 2 green pens and I had 3 black pens and I pulled one of them out of a hat what is the probabilty of getting a green pen?

6 Answers

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  • jake
    Lv 5
    1 decade ago
    Favorite Answer

    2/5 or 40%

  • modulo_function
    Lv 7
    1 decade ago

    It depends.

    If you loaded your hat with 3 red pens and 2 purple pens then the probability of getting a green pen would be zero.

  • NZlink
    1 decade ago

    No of green pens = 2

    Favourable event n(E) = 2

    No. of black pens = 3

    Sample space = green pens + black pens

    n(s) = 2+3 = 5

    Probability P(E) = n(E)/n(S)

    =2/5

    =40%

  • kelsey
    1 decade ago

    2/5

    because you have 2 green pens out of the total amount of pens

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  • Phil B
    1 decade ago

    2g out of 5 total pens in the bag.

    the ratio would be 2:3 the probability is 2/5

  • Philo
    Lv 7
    1 decade ago

    favorable outcomes divided by possible, 2 green / 5 possible = 2/5

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