**Home »Aptitude Formulas »Average Important Formulas**

**Average Important Formulas:**

**Average:**

Average = (Sum of observations / Number of observations)

**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 (2xy / x+y ) kmph.

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Pipes and Cisterns Important formulas

Problems on Age Important formulas