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Question

The arithmetic mean of the series nc0,nc1,nc2.....,ncn is:

A
2nn+1
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B
2nn
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C
2n1n+1
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D
none of these
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Solution

The correct option is A 2nn+1
wehavex=nC0+nC1+......+nC0=2nNote that number of observations is n+1 ¯x=2nn+1

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