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Let $X_1$ and $X_2$ have jointly density function $f$ given by

$f(x_1,x_2)=\left\{\begin{array}{cc}2;&0

Find $P (\frac{1}{6}.

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    Corrected some notations confusing random variables and arguments of their PDF.2012-12-16
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    Any luck with the answers?2012-12-19

3 Answers 3