Recent questions tagged expected-value

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This is from question one from lecture 4B's exercises: "In the first week of November 2003, five unrelated homicides were reported in the GTA. The GTA usually has about 7...
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If x is the number that comes up when you roll a 20 sided die. What is the expected value of x?
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An investor has a 0.60 probability of making a 20000 dollar profit and a 0.40 probability of suffering a 25000 dollar loss. What is the expected value?
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