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Questions  >>  CBSE XI  >>  Math  >>  Statistics
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Q)

Coefficient of variance of two distributions are 50 and 60 , and their arithmetic means are 30 and 25 respectively. Difference of their standard deviation is:

$\begin{array}{1 1}(A)\; 0 \\(B)\;1 \\(C)\;1.5 \\(D)\;2.5 \end{array} $

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