Which of the following statements regarding pert analysis is true? a. each activity has two estimates of its duration. b. project variance is the sum of all activity variances. c. only critical activities contribute to the project variance. d. the most likely time is equivalent to the expected activity time. e. project standard deviation is the sum of all critical activity standard deviations.

It's c.

Explanation:

Program Evaluation and Review Technique (PERT) is a method used in program management. It analyzes the time required to complete each task in a project and so tries to determine the minimum time to complete a project. It was developed by the US Navy in 1957.

In PERT analysis:

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"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"

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