the mean of 25 observations is 27 if one observation is included the mean still remain 27 find the included observation
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here is ur answer
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Given,
The mean of 25 observations is 27.
So,
The total sum of all the 25 observations = 27 x 25 = 675
After one observation is included,
Now the mean of 26 (25 + 1) numbers = 27
So,
The total sum of all the 26 observations = 27 x 26 = 702
Hence,
The included observation = 702 – 675 = 27
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