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Arithmetic Aptitude :: Average

Average - Important Formulas

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  1. Average

              Average =  \(\frac { sum of observations } { Number of observations} \)   
     
  2. Average Speed:

    Suppose a man covers a certain distance at x kmph and an equal distance at y kmph.

    Then, the average speed druing the whole journey is \(\frac { 2xy } { X +Y }\) kmph