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Extracted text: PERT Calculations yield a project length of 45 weeks with a variance of 12.25. The project is expected to complete with a probability of 90% in how many weeks.(Round off to next higher integer) 1.1 1.2 1.3 Probability 86.43 88.49 90,32 Use above table for linear interpolation. 50 O 51 52 53