The mean of 25 observations is 27. If one observation is included, the mean still remains
27. Find the included observation.
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0
Answer:
27
Step-by-step explanation:
Mean = Sum / number of values
So, existing sum = 25*27 = 675
New mean = 27 = (675 + new value) / 26
675 + new value = 27*26
675 + new value = 702
new value = 27
Answered by
0
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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