In a data, if the number i is repeated i times for i=1 ,2, ..... n, then the mean of the data is

Question

Accepted Answer

Correct answer: C. (c) Since, i is repeated i times for i=1 ,2 ,3 , … ,n. Hence, mean of the given data will be X= 1 1+2 2+3 3+ …+n n1+2+3+ …+n= n^2 n = n (n+1 ) (2n+1 )6 n (n+1 )2= 2n+13 .

$In a data, if the number i is repeated i times for i = 1, 2, ..... n, then the mean of the data is$

Solution

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