Question: [ begin{aligned} text { days }_{s}=t_{e} & =frac{a+4 m+b}{6} sigma_{t e} & =left(frac{b-a}{6} ight) text { Variance } & =sigma_{t_{e}}^{2} end{aligned} ] Standard

\[ \begin{aligned} \text { days }_{s}=t_{e} & =\frac{a+4 m+b}{6} \\ \sigma_{t e} & =\left(\frac{b-a}{6} ight) \\ \text { Variance } & =\sigma_{t_{e}}^{2} \end{aligned} \] Standard deviation of Projec 
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