1.

The simple and weighted arithmetic mean of the first n natural numbers, the weights being the corresponding numbers is

Answer»

`(N+1)/(2), (2n+1)/(2)`
`(n+1)/(2), (2n+1)/(4)`
`(n+1)/(2), (2n+1)/(3)`
`n, n^(2)`

ANSWER :C


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