Conditional probabilities involving functions of random variables and the variables












1














I have that $Z = X + 2Y$. $X, Y$ are independent. I know $f_X(x), f_Y(y), f_{X,Y}(x,y)$ and $f_Z(z). $ How can I find $f(x,y|z)$?



I know that $f(x,y|z) = f(x, y, z)/f(z) = f(z| x, y)*f(x, y)/f(t)$ but i'm stuck because I can't find $f(x, y, z)$ or $f(z| x, y)$. Which strategies can I use?



I would also appreciate if someone can recommend me a book or a page with results involving conditional probability and sums/functions of random variables, independent or not.



Thanks in advance.










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    1














    I have that $Z = X + 2Y$. $X, Y$ are independent. I know $f_X(x), f_Y(y), f_{X,Y}(x,y)$ and $f_Z(z). $ How can I find $f(x,y|z)$?



    I know that $f(x,y|z) = f(x, y, z)/f(z) = f(z| x, y)*f(x, y)/f(t)$ but i'm stuck because I can't find $f(x, y, z)$ or $f(z| x, y)$. Which strategies can I use?



    I would also appreciate if someone can recommend me a book or a page with results involving conditional probability and sums/functions of random variables, independent or not.



    Thanks in advance.










    share|cite|improve this question







    New contributor




    Bruce Kane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      1












      1








      1







      I have that $Z = X + 2Y$. $X, Y$ are independent. I know $f_X(x), f_Y(y), f_{X,Y}(x,y)$ and $f_Z(z). $ How can I find $f(x,y|z)$?



      I know that $f(x,y|z) = f(x, y, z)/f(z) = f(z| x, y)*f(x, y)/f(t)$ but i'm stuck because I can't find $f(x, y, z)$ or $f(z| x, y)$. Which strategies can I use?



      I would also appreciate if someone can recommend me a book or a page with results involving conditional probability and sums/functions of random variables, independent or not.



      Thanks in advance.










      share|cite|improve this question







      New contributor




      Bruce Kane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I have that $Z = X + 2Y$. $X, Y$ are independent. I know $f_X(x), f_Y(y), f_{X,Y}(x,y)$ and $f_Z(z). $ How can I find $f(x,y|z)$?



      I know that $f(x,y|z) = f(x, y, z)/f(z) = f(z| x, y)*f(x, y)/f(t)$ but i'm stuck because I can't find $f(x, y, z)$ or $f(z| x, y)$. Which strategies can I use?



      I would also appreciate if someone can recommend me a book or a page with results involving conditional probability and sums/functions of random variables, independent or not.



      Thanks in advance.







      conditional-probability






      share|cite|improve this question







      New contributor




      Bruce Kane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|cite|improve this question







      New contributor




      Bruce Kane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|cite|improve this question




      share|cite|improve this question






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      Bruce Kane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked Dec 26 at 10:55









      Bruce Kane

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      New contributor




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      Bruce Kane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






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