Q 1303145048.     The weighted mean of first `n` natural numbers whose weights are equal to the squares of the corresponding numbers is

A

`{n+1}/{2}`

B

`{3n(n+1)}/{2(2n+1)}`

C

`{(n+1)(2n+1)}/{6}`

D

None of these

HINT

Weighted mean `= {1*1^2+2*2^2+....+n*n^2}/{1^2+2^2+....+n^2}`

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