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 December 23rd, 2013, 09:11 AM #1 Newbie   Joined: Dec 2013 Posts: 1 Thanks: 0 Random variable - multivariable Hi experts! Im new in this forum. I expect you can help me. I have a random variable , $A$, defined by: $A=\frac{\sum l_{j}cos\theta _{j}}{\sum l_{j}sin\theta _{j}}$ with $1\leq j\leq N$. Here $l_{j}\sim$ log normal distribution with parameters L and SDl and $\theta _{j}\sim$ normal distribution center in cero with sd= SDtheta. How can I obtain the probabilidy density distribution of random variable $A$? Waiting for your answers. Thanks a lot!

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