# Thread: joint probability density functions help

1. ## joint probability density functions help

Assume that the joint density of X, Y and Z is given by
fX;Y;Z(x; y; z) = 6x/z^3 ; 0 < x < y < z < 1:

(a) Compute the marginal densities of X, Y and Z.
(b) Find P(Z <= .8; Y <= .5)

not sure how to do this

2. You should not post the entire problem onto this forum and ask someone else to solve it for you. Please do not answer the problem. This is a homework assignment and this student has violated Cornell University's Academic Code.

Instead, you should go to your professor or TA's office hours and consult for help there.

3. Originally Posted by CUEngineering
You should not post the entire problem onto this forum and ask someone else to solve it for you. Please do not answer the problem. This is a homework assignment and this student has violated Cornell University's Academic Code.

Instead, you should go to your professor or TA's office hours and consult for help there.
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