Final answer:
To find the marginal probability density functions of X and Y, we integrate the joint probability density function (F(x, y)) in terms of y to find f(x) and integrate it in terms of x to find f(y).
Step-by-step explanation:
A marginal probability density function represents the probability distribution of a single random variable. To find the marginal probability density functions of X and Y, we need to integrate the joint probability density function (F(x, y)) in terms of y to find f(x) and integrate it in terms of x to find f(y).
For example, to find f(x), we integrate F(x, y) with respect to y over the entire range of y values. This gives us the marginal probability density function f(x) for the variable X.
To find f(y), we integrate F(x, y) with respect to x over the entire range of x values. This gives us the marginal probability density function f(y) for the variable Y.