Given that the mean of five numbers is 27 .If one of the numbers is excluded the mean gets reduced by 2 determine the excluded numbers
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Answer:
mean of five numbers=27
so, sum of 5 numbers=27 x 5=135
let excluding number is x
now ,
sum of 4 numbers =135-x
mean=sum of 4 numbers/4=(135-x)/4
=> 27-2=(135-x)/4
=> 25 x 4=135-x
=> 100-135=-x
=> x=35
hence excluded number is 35
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