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An activity has optimistic and pessimistic times of 4 and 14 days. What is its variance?

  1. 1.67 days2
  2. 16.67 days2
  3. 2.78 days2
  4. 10.00 days2

Answer

C. 2.78 days2

Solution

2 = ((b - a)/6)2 = (10/6)2 = 2.78 days2.

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