Mean of 15 observation is 200. If one observation is excluded, their mean is 198. Find the value of excluded observation.

Answers (1)

Mean of 15 observation=200

Rightarrow Total sum of 15 observations= 15	imes 200=3000

On excluding an observation, the mean of remaining 14 observations is 198
	herefore Total sum of remaining 14 observations = 14	imes 198=2772

Rightarrow Excluded observation = Total of 15 observations - Total of remaining 14 observations

Rightarrow 3000-2772=228

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