CBSE Class 10 Answered
mean
Asked by | 21 Jan, 2009, 12:58: PM
Expert Answer
let the sum of the observations be S
then S/n = x
now we are adding 1 in first term,2 in second term and so on
so new sum will be = S+S1
where S1 = 1+2+3+....+n = n(n+1)/2
so new mean will be = (S+S1)/n = x+ (n+1)/2
Answered by | 22 Jan, 2009, 09:44: AM
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