Question

the mean of 5 nos is 27 if one number is included the new mean is 25. find the included no

Answer 1

Step-by-step explanation:

Let the mean of the first five no. be (n)

Given that,

(n1+n2+n3+n4+n5) /5=27

(n1+n2+n3+n4+n5)=135

Also given,

(n1+n2+n3+n4+n5+n6) /6=26

(n1+n2+n3+n4+n5+n6)=156

Then,

Excluded No. =(n1+n2+n3+n4+n5+n6)-(n1+n2+n3+n4+n5)

= 156-135

= 21 Answer....

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