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} Determine the marginal probability distribution of X.
Definitions:
Jail Time
The period an individual is required to spend in prison as a consequence of a crime they have been convicted of.
Margin of Error
An estimate of the amount of possible error in the results of a survey or poll, often expressed as a percentage.
Confidence Coefficient
The probability that a confidence interval will contain the true parameter value.
Population Proportion
The portion of members in a population that exhibit a specific characteristic, typically expressed as a fraction or percentage.
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