These data represent the grades on a college exam. Find the mean 
Definitions:
Total Utility
Total utility is the total satisfaction or benefit a consumer receives from consuming a given total quantity of a good or service.
Indifference Map
A graph representing a set of indifference curves to illustrate consumer preferences for different combinations of goods, assuming equal satisfaction.
Total Utility
The total satisfaction received from consuming a particular quantity of goods or services.
Money Income
The complete sum of money earned by an individual or a household that includes earnings from work, salaries, and additional income sources.
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