Is there a way to calculate these two quantities if I'm throwing two twelve sided die and adding the results that's easier than going through all possible combination and their probabilities?

Thanks.

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- Feb 17th 2013, 08:14 PMkkarExpect value and standard deviation
Is there a way to calculate these two quantities if I'm throwing two twelve sided die and adding the results that's easier than going through all possible combination and their probabilities?

Thanks. - Feb 17th 2013, 08:35 PMPlatoRe: Expect value and standard deviation

Look at this webpage

Scroll down to the fully expanded form of the expression.

That gives you all the impossibles.

For example the term tells us that there eleven ways to roll a sum of fourteen. So the probability is of getting a sum of fourteen. - Feb 18th 2013, 12:25 PMkkarRe: Expect value and standard deviation
Thanks Plato!