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:
Inequality
The unequal distribution of resources, opportunities, rights, and power among individuals or groups in a society.
Teacher Expectancy Effect
The impact that a teacher's expectations about a student's performance can have on the student's actual achievements.
Self-fulfilling Prophecy
A belief or expectation that influences one's behavior in such a way that it causes the belief to come true.
Stereotype Threat
The anxiety or concern individuals may experience when they feel they are at risk of confirming negative stereotypes about their social group.
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