Probability #9: DISCREEEET RANDOM VARIABLE FORMULAS

How do you find the expected value and standard deviation of a random variable?
Where do the formulas come from?
I hope this video helps!

[@tiffanijones9398]

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[@uchihasasuke7354]

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[@KendallKnaus]

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[@h1pp063]

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[@oniaon]

thank you for your videos! They have been helping me with understanding statistics :)