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Follow these steps:

  • Find all the values that the random variable (RV) can take, x.
  • For each x, find the probability that the RV takes than value, p(x).
  • Multiply them: x*p(x).
  • Sum these over all possible values of x.

The above sum is the expected value of the RV, X.

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Q: How do you compute expected value from random discreet variable?
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Is the expected value of a discrete random variable equal to the mean of the random variable?


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