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The optimistic time, the pessimistic time and the most likely time of a job are 6, 13 and 8 days respectively. The variance for this job is ________
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- 1.145 to 5.56
- 4.25 to 1.52
- 2.45 to 3.54
- 1.34 to 1.37
Correct Option: D
(1.34 to 1.37)
| = | ||
| 6 |
The variance is given by :
| V = |  |  | ² | |
| 6 |
| = | | | ² | = 1.36 | |
| 6 |
