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Question

In a series of observations, S.D.=7 and mean is 28, the coefficient of variation is

A
4
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B
1/4
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C
25
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D
12.5
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Solution

The correct option is C 25
The coefficient of variation (Cv) is defined as the ratio of the standard deviation σ to the mean μ
Cv=σμ×100
Cv=728×100
Cv=14×100
Cv=25

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