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

Find the mean deviation about the mean for data : $x_i :5,7,9,10,12,15 \qquad f_i : 8,6,2,2,2,6$

$\begin{array}{1 1}(A)\;3.23\\(B)\;3\\(C)\;2\\(D)\;7\end{array} $

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