Car Sales
The joint probability distribution of variables X and Y is shown in the table below.Rebecca and Rachel are car salespeople.Let X denote the number of cars that Rebecca will sell in a month,and let Y denote the number of cars Rachel will sell in a month. 
-{Car Sales Narrative} Verify that V(X + Y)= V(X)+ V(Y).Did you expect this result? Why?
Definitions:
Nudibranch Mollusks
Colorful sea slugs known for their striking forms and colors, which have shed their shells during evolutionary development.
Tracheal Tubes
A system of branching air ducts within insects that spread across the body to facilitate the exchange of gases.
Body Surface
The outermost layer or covering of an organism's body, including the skin, fur, or scales, which serves as a protective barrier.
Nudibranch Mollusks
Colorful sea slugs found in marine environments, known for their striking forms and colors.
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