Averages

Always people find it difficult to remember the information given in different groups or in different numbers. In such cases, the approximate number is useful. That is why we often hear remarks such as, the average of Sachin's runs in five innings is 65, in a standard VII class of 65 pupils, the average attendance last week was 60. Let us try to find out the mathematical meaning of the word "Average" first. Have a look at the following example.

All of us know that the speed of a vehicle does not remain constant during a journey. Therefore, the distance traveled is different in each hour. Still taking into consideration the total distance traveled and and total time required for that, the distance traveled by that vehicle per hour is determined for the sake of convenience. In order to find out

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Average

• Average of Given Items :
  
  

Average =		Sum of the given Items
		Number of those Items




• Average Speed :
  
  
  Suppose a Person covers a certain distance at X kmph and an equal distance at Ykmph.
  
  Then, the average speed for the whole journey will be (2XY)/(X+Y) Kmph

✒ Lets do some problems on Average (Click Here)