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THE PROFESSIONAL LIFE

Do the Math

The stock prices of two companies at the end of any given year are modeled with random variables X and Y that follow a distribution with joint density function

What is the conditional variance of Y given that X = x ?

  1. 1/12
  2. 7/6
  3. x + 1/2
  4. x2 – 1/6
  5. x2 + x + 1/3
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