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:
Oral Contracts
Agreements between parties that are made verbally and not memorialized in writing, yet are still legally binding in many cases.
Reformation
A court-ordered correction of a written contract so that it reflects the true intentions of the parties.
Erroneous Legal Description
A mistake or inaccuracy in the written account of the boundaries or details of a property in legal documents.
Sale of Land
The transfer of ownership of a parcel of real estate from one party to another, typically through a legal process.
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