Construction Planning and Management
If the optimistic time, most likely time and pessimistic time for activity A are 4, 6 and 8 respectively and for activity B are 5, 5.5 and 9 respectively, then

expected time of activity A is greater than the expected time of activity B
None of these
expected time of activity B is greater than the expected time of activity A
expected time of both activities A and B are same

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Construction Planning and Management
At a work site, statistical quality control of concrete means

Reduction in costs for the removal of defects
Reduction in wastage of inspection costs
Applying the theory' of probability to sample testing or inspection
Measurement of risks to eliminate failures

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