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E[# needed] = E[SUM(i from 1 to n) Xi] = SUM(i from 1 to n)E[Xi] | E[# needed] = E[SUM(i from 1 to n) Xi] = SUM(i from 1 to n)E[Xi] | ||
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Revision as of 05:37, 5 October 2008
E[# needed] = E[SUM(i from 1 to n) Xi] = SUM(i from 1 to n)E[Xi]