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The pessimistic time and optimistic time of completion of an activity are given as 10 days and 4 days respectively. Then the variance of the activity is

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Be careful not to confuse standard deviation with variance! - $\text{Standard Deviation} = \frac{t_p - t_o}{6}$ - $\text{Variance} = \left(\frac{t_p - t_o}{6}\right)^2$ Always make sure to square your result when a question asks for the variance.

Updated On: Jul 9, 2026

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The Correct Option is D

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The pessimistic time and optimistic time of completion of an activity are given as 10 days and 4 days respectively. Then the variance of the activity is

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The Correct Option is D

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