Question $47$

Problem $2$

Consider the network described in the table below.

Immediate Optimistic Likely Pessimistic

$\backslash$table$[[,$Predecessor$($s$,\backslash$table$[[$Time$],[($days$)]],,\backslash$table$[[$Time$],[($days$)]]],[$W$,$none,$4,6,14],[H,$none,$7,10,13],[$C$,$W$,3,5,7],[$G$,H,4,6,8],[E,H,3,3,3],[,C,E,1,4,10]]$

What is the probability of completing the project in $15$ days or less?