What is the difference between Marginal PDF and Joint PDF and Conditional PDF?

Hello Friends,

I am facing problem to find difference between Marginal PDF and Joint PDF and Conditional PDF?

I think if i have joint pdf then from joint pdf i can get thee marginal pdf by integrating with respect to the other random variable that i am not interested to get the marginal pdf.Like if x and y are two random variables and i have the joint pdf of x and y then i can get the marginal pdf of x my integrating the joint pdf with respect to y.Am i right?

Himadri

Tech N Techie