A Project Has 3 Independent Stages That Must Be Completed

question 29

Multiple Choice

A project has 3 independent stages that must be completed in sequence. The time to complete each stage is a random variable. The standard deviations of the completion times for the stages are σ₁ = 5, σ₂ = 4, σ₃ = 6. The standard deviation of the overall project completion time is:

• A)8.77
• B)15.0
• C)14.2
• D)9.24

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