A Project Consists of Four Consecutive Tasks That Have Average

A project consists of four consecutive tasks that have average duration and worst-case duration estimates (in days) as shown in the table.Use Newbold's model to determine the aggregated buffer of one standard deviation for this project. $$\begin{array} { | l | l | l | } \text { Activity } & \text { Average } & \text { Worst-Case } \\\hline \mathrm { X } & 12 & 20 \\\hline \mathrm { Y } & 20 & 25 \\\hline \mathrm { W } & 14 & 24 \\\hline \mathrm { W } & 18 & 26 \\\hline\end{array}$$

A) 31 days
B) 16 days
C) 8 days
D) 5 days

Correct Answer:

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