Range and mean deviation - class-X

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Question 1 of 23

Coefficient of deviation is calculated by the formula:

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$\cfrac { \bar { X } }{ \sigma } \times 100$

$\cfrac { \bar { X } }{ \sigma }$

$\cfrac { \sigma } {\bar { X }} \times 100$

$\cfrac{ \sigma } { \bar { X }}$

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