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Question

Mathematics Question on Statistics

The S.D. of the first n natural numbers is

A

n+12,\frac{n+1}{2},

B

n(n+1)2\sqrt{\frac{n(n+1)}{2}}

C

nn−112\sqrt{\frac{n^n-1}{12}}

D

none of these.

Answer

n(n+1)2\sqrt{\frac{n(n+1)}{2}}

Explanation

Solution

Answer (b) n(n+1)2\sqrt{\frac{n(n+1)}{2}}