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April 17, 2015

April 17, 2015

Posted by **tana** on Wednesday, August 25, 2010 at 11:42pm.

- math -
**drwls**, Thursday, August 26, 2010 at 7:34amAdd the probabilities of getting

I assume you want the probaility of getting 2 to 9 INCLUSIVE. You could add the probabilities of getting

2,3,4,5,6,7,8 and 9

OR,

subtract from 1, the probabilities of getting 10,11, or 12.

Let's do it the latter way, since it's quicker.

1 - 3/36 - 2/36 - 1/36 = 5/6

if you are wondering where the 3/36 came from, the probability of getting 10 is 3/36, since the ways of getting it are

5+5, 6+4 or 4+6, and there are 6*6 possible outcomes.

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