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The mean of the values of 1,2,3,...n wit...

The mean of the values of `1,2,3,...n` with respectively frequencies `x, 2x, 3x,...,nx` is:

A

(2x+1)

B

x(x+1)(2x+1)

C

`((2x+1))/(3)`

D

None of these

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The correct Answer is:
C
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