A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph. 
If a frequency histogram were to be created using these data,how many classes would you create?
Definitions:
Total Expense Line
A financial metric that represents the sum of all expenses encountered by a business, usually presented in the income statement.
Total Revenue Line
A financial metric representing the total amount of money generated from sales before any expenses are subtracted.
Sales Mix
The proportion of different products or services that a company sells, representing the combination of sales that impacts overall profitability.
Total Profits
The sum of net income or net earnings of a company after all expenses, including taxes and costs, have been deducted from total revenue.
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