If the following jobs are sequenced according to the DDATE rule then the mean completion time (in days) for all jobs is (assume zero for today's date) 
Definitions:
Probability Distribution
A mathematical function that describes the likelihood of different outcomes in a random event.
Trial-and-Error
A problem-solving method involving repeated, varied attempts which are continued until success, or until the agent stops trying.
Transferable Inferences
The logical deductions that can be applied from one context to another, fostering learning and understanding across different situations.
Interactive Effects
Phenomena where the impact of one factor on an outcome is influenced by the presence or level of another factor.
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