The man-hour estimate for test and evaluation was developed using expert opinion to come up with optimistic,

The man-hour estimate for test and evaluation was developed using expert opinion to come up with optimistic, pessimistic and most likely positions. This resulted in a triangular distribution with a minimum estimate of 250 hours, a most likely estimate of 325 hours, and an expected maximum of no more than 475 hours. Calculate the variance of this distribution.

Possible answers:
2188
525
92604
3000