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Range and mean deviation - class-X

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Multiple Choice

Coefficient of deviation is calculated by the formula:

  1. $\cfrac { \bar { X } }{ \sigma } \times 100$
  2. $\cfrac { \bar { X } }{ \sigma }$
  3. $\cfrac { \sigma } {\bar { X }} \times 100$
  4. $\cfrac{ \sigma } { \bar { X }}$
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