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

Find the mean deviation about the mean for data : $x_i :10,30,50,70,90 \qquad f_i : 4,24,28,16,8$

$\begin{array}{1 1}(A)\;26\\(B)\;16\\(C)\;76\\(D)\;7\end{array} $

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