Question

Given that the mean of five numbers is 27. If one of thebnumber is excluded the mean gets reduced by 2. Determine the excluded number.

Answer 1

Here, n=5, mean=27
Therefore
total= 27X5=135
 
So the total of 5 numbers is 135.
Let the excluded number be a. then the total of 4 numbers is 135-a
Mean of 4 numbers =135-a/4
25=135-a/4
100=135-a
-a=-35
A=35
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