Golfing Store The Joint Probability Distribution of Variables X and Y Is

Short Answer

Golfing Store
The joint probability distribution of variables X and Y is shown in the table below,where X is the number of drivers and Y is the number of putters sold daily in a small golfing store. ​ ​
-{Golfing Store Narrative} Calculate E(X + Y)and V(X + Y)directly by using the probability distribution of X + Y.