Look for a problem on the correlation coefficient (discrete case) where the pmf is given. Copy the problem and solve it.

Show all solutions such as the E(X), E(Y), E(XY), E(X^2), E(Y^2), V(X), and V(Y).

Subject: Probability Theory 2

LOOK meaning we must find it, pmf means probability mass function.

Here's the link for the example https://online.stat.psu.edu/stat414/lesson/18/18.2

then we have to solve its E(X), E(Y), E(XY), E(X^2), E(Y^2), V(X), and V(Y).