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September 28th, 2018, 12:17 AM  #1 
Newbie Joined: Sep 2018 From: France Posts: 1 Thanks: 0  How do I find the mean of Z = Discrete RV + a Gaussian RV?
Hello, I am asked to find mean and variance of Z. (image in attachment) Since I am solving a preparatory examen to study, it is not clear to me how to approach the topic because I don't understand the question correctly. What are the steps to follow given the nature of the RV "Z" ?, which is formed by two different types of RV's. Thank you 
September 28th, 2018, 01:08 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,806 Thanks: 716 
$W=\frac{Xm}{\sigma}$. The mean of the sum is the sum of the means. The variance of the sum of independent random variables is the sum of the variances.


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discrete, find, gaussian, mean value 
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