Question: After applying a three - point estimation on a critical path, consisting of two activities, the duration uncertainties ( pessimistic minus optimistic estimates ) at

After applying a three-point estimation on a critical path, consisting of two activities, the duration uncertainties (pessimistic minus optimistic estimates) at +/-3-sigma confidence interval of the first activity was 18 days; the second uncertainty was 24 days. Applying the PERT formula for paths, what is the duration uncertainty for the entire path?

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