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CGP EDU Academic Team
Published on: August 13, 2026
The mean and variance of a data set comprising 15 observations are 15 and 5 respectively. If one of the observation 15 is deleted and two new observations 6 and 8 are added to the data, then the new variance of resulting data is
Text Solution
Verified by ExpertsThe correct answer is:
B
11.8125
Let 15 observations are x 1 , x 2 ......x 15
If x 15 = 15
New variance 
= 11.8125
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