Question

Joint Probability Function

Answer 1

i am just lost on this problem

Answer 2

Just build the table.

Answer 3

Do you see how to do it?

The top grid is the given probabilities, given the specified values of X and Y.
The bottom grid is the sum of X+Y. Which of these fit the criteria?

Answer 4

i see it, so to find the p(X+Y>3), would i add up the joint probabilities that are greater than 3?

Answer 5

That's it. I colored them yellow, for you.

Can you do the X*Y now?

Answer 6

Yes, Thank you!

Answer 7

ty tkhunny