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December 20, 2014

December 20, 2014

Posted by **mae** on Friday, June 29, 2012 at 8:28am.

- math -
**Reiny**, Friday, June 29, 2012 at 10:28amlet's pick one of the letters, say the A

Prob(A) = 1/4

you want that to happen 10 times in a row

prob(10 A's) = (1/4)^10

but the same reasoning can be used for each of the 4 letters, so

prob(10 of the same letter) = 4(1/4)^10 = (1/4)^9

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