The sum of three numbers is 17. The sum of twice the first number, 4 times the second number and 5 times the third number is 56. The difference between 7 times the first number and the second number is 41. Find the three numbers.

Using pert, adam munson 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? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?