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Posted by **king chris** on Tuesday, November 27, 2012 at 10:09am.

1/2

2/9

5/9

7/9

14/19

- pre calculus -
**Steve**, Tuesday, November 27, 2012 at 10:24amsince 2 of the 9 marbles are black,

p(~black) = 1-p(black) = 1-2/9 = 7/9

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