Expected Values: If E(X) = 100, what is E(-X)?

DonStat

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Feb 22, 2016
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How do I work this problem? Given a defined expected value, E(X), what is E(-X)?
 
Not sure if this question can be answered unless you know the 2 outcomes of X. We know the positive outcome is 100, but the negative outcome must be specified, I believe, in order to know this.
 
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