# Probability and Statistics Question help please

For the joint p.d.f. of X and Y given below calculate the marginal p.d.f?s fX and fY , the p.d.f. fY /X and the conditional expected value E[Y | X] of Y given X :

f(x, y) = 4*e^(?2y),  0 < 6x < y

• Can you double check the definition of the joint pdf? It fails to integrate to one and I believe something may be missing here.

• Just double checked, what i have written is correct