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

Find the mean deviation about the mean for data : $x_i :15,21,27,30,35 \qquad f_i : 3,5,6,7,8$

$\begin{array}{1 1}(A)\;5.1\\(B)\;3\\(C)\;2.5\\(D)\;7.6\end{array} $

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