Question

The mean of five numberis 27. if one more number is included, then the mean is 25. find the excluded observation

Answer 1

Answer:

Step-by-step explanation:

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