# Question: If F x y is the value of the joint

If F( x, y) is the value of the joint distribution function of X and Y at ( x, y), show that the marginal distribution function of X is given by

G( x) = F( x,âˆž) for - âˆž < x < âˆž

Use this result to find the marginal distribution function of X for the random variables of Exercise 3.54 on page 91.

G( x) = F( x,âˆž) for - âˆž < x < âˆž

Use this result to find the marginal distribution function of X for the random variables of Exercise 3.54 on page 91.

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