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2.16 Bivariate Random Variables Discrete Case Continuous Case ...

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<strong>2.16</strong> <strong>Bivariate</strong> RV’s<br />

Easy Example: Choose a point at random in the interior<br />

of the circle x 2 + y 2 = 16. Find the pdf of<br />

(X, Y ).<br />

Since the area of the circle is 16π,<br />

f(x, y) =<br />

⎧<br />

⎨<br />

⎩<br />

1<br />

16π if x2 + y 2 ≤ 16<br />

0 otherwise<br />

8

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