- #1

afireinside

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## Homework Statement

Let the joint density of the material and labor cost of a project be modeled by

f

_{x,y}(u,v) = 2v*e

^{-v*(2+u)}u,v ≥ 0

= 0 otherwise

a) find marginal density of X and Y

b) find E(Y)

## Homework Equations

Marginal density of Y should be ∫f

_{x,y}(u,v) du from 0 to ∞, unless there is some other relationship between X and Y, and u and v that I am missing. I get undefined when trying to do this integral, so I know it can't be right.