Question: 12-20 Using PERT, Ed Rose was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months

12-20 Using PERT, Ed Rose was able to determine that the

expected project completion time for the construction

of a pleasure yacht is 21 months and the project

variance is 4.

(a) What is the probability that the project will be

completed in 17 months or less?

(b) What is the probability that the project will be

completed in 20 months or less?

(c) What is the probability that the project will be

completed in 23 months or less?

(d) What is the probability that the project will be

completed in 25 months or less?

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