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The joint probability density function of two continuous random variables X and Y is f (x,y) ={ cy ,0 < or =y 0 , otherwise

The joint probability density function of two continuous random variables X and Y is

f (x,y) ={ cy ,0< or =y

0 , otherwise

Find the

  1. value of c
  2. expected value of X2Y when X>2.

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