# joint probability density functions help

• Sep 27th 2009, 03:06 PM
jlucas285
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
• Sep 27th 2009, 05:24 PM
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.
• Sep 28th 2009, 12:29 AM
mr fantastic
Quote:

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.

Any post that a member is concerned about should be reported to a Moderator using the Report Post tool (the small triangle found in top right cornell of post).