The diagram below identifies the elements of service as provided by a soft drink vending machine. Each element has an estimate of its own reliability, independent of the others. What is the reliability of the "system"? 
Definitions:
Constant
In finance, this often refers to a fixed value or number that does not change over time in formulas or calculations.
Growth Opportunities
Potential scenarios or projects that might result in an increase of value or expansion for a business.
Earnings Per Share
A financial metric that divides a company's profit available to shareholders by the outstanding shares, indicating the profitability on a per-share basis.
Required Rate Of Return
The minimum annual percentage of gain an investment must generate to be considered acceptable to an investor.
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