Answer:
[tex]\text{the weighted average of a, m, and b, with m weighted 4 times as heavily as a and b.}[/tex]
Step-by-step explanation:
[tex]\text{The expected activity time in PERT analysis is calculated as:}[/tex]
[tex]\mathbf{\dfrac{a+4m + b}{6}}[/tex]
[tex]where;[/tex]
[tex]\text{a = optimistic duration; }[/tex]
[tex]\text{m = most likely duration and;}[/tex]
[tex]\text{ b = pessimistic duration from the above formula.}[/tex]