A certain experiment has 2 possible outcomes, t, and tz. These outcomes are equally likely to occur when
the experiment is performed. These are 2 discrete random variables defined for this experiment, X and Y.
When outcome t, occurs, X has the value 0 and Y has the value -2. When outcome ty occurs, X has the
value 1 and Y has the value 2. All of this information is summarized in the table shown below. Find
(X+Y).
outcome probability x y
ti 1/
2 0
1/2 1