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DaveG39131
Lv 5
DaveG39131 asked in Science & MathematicsMathematics · 8 years ago

Probability question?

There are 14 marbles in a bag, 2 of which are black. If you take 3 marbles out, what is the probability at least 1 is black?

2 Answers

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  • M3
    Lv 7
    8 years ago
    Favorite Answer

    taking as drawals w/o replacement

    1 - P(all non-black) = 1 - 12/14 *11/13 *10/12 = 0.3956 <------

  • Anonymous
    8 years ago

    Close for the above answer, except there are three marbles.

    So 12/14*11/13*10/12

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