What is the expected completion time of the project

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A small project consists of 3 activities : X, Y and Z. To commence activity Z, both X and Y need to be complete. Activity X takes 3 days with a probability of 50% and 5 days with a probability of 50% and so does Activity Y. Activity Z takes 1 day. What is the expected completion time of the project?

Reference no: EM13956562

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