What is the equation for finding E(S2)

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- Nov 19th 2011, 08:07 AMHelpmeplease1Mean of a tree diagram
What is the equation for finding E(S2)

Thanks

http://i41.tinypic.com/2czc6x5.png - Nov 19th 2011, 08:43 AMPlatoRe: Mean of a tree diagram
$\displaystyle E(S_2)=1\cdot \mathcal{P}(1)+6\cdot \mathcal{P}(6)+9\cdot \mathcal{P}(9)$

- Nov 20th 2011, 02:51 AMHelpmeplease1Re: Mean of a tree diagram
- Nov 20th 2011, 03:10 AMPlatoRe: Mean of a tree diagram
- Nov 20th 2011, 03:45 AMHelpmeplease1Re: Mean of a tree diagram
So is E(S2) = E(S2|S0)