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} Find the probability distribution of the random variable X + Y.
Definitions:
Frontal Lobe
A region of the brain located at the front part, responsible for voluntary movement, expressive language, and managing higher level executive functions.
Task
An assigned piece of work or duty that is to be done within a certain timeframe.
Human Cortex
The outer layer of the brain involved in high-level functions such as consciousness, thought, emotion, reasoning, language, and memory.
Brain Volume
The total volume of the brain, including the cerebral cortex and subcortical structures, which can be measured through imaging techniques and has implications for various cognitive and physical health conditions.
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