Average Basics

Average topic is very important in all competitive exams. In this article we are going learn basics.


Average:

                                         

Ex: Find the average of 10, 14, 26 and 12.

Ans:                      

                                     

                                                                  =  62/4   

                                                                  = 15.5 

Note : For some cases without calculating we can answer for the question.

Consecutive Number:  x , x+1 , x+2 , x+3, x+4 ..................

here x will be any number

Note :in the above consecutive number case we can say answer will be the middle number . To understand better lets take one example.

 Ex: Find the average of  97 , 98 , 99 , 100 , 101

Ans: Directly we can say answer is 99

Ex: Find the average of  105, 106, 107, 108

Ans: Directly we can say answer is 106.5

Consecutive even number:  x , x+2 , x+4 , x+6 ,...............

                     Here x will be even number

Note :in the above consecutive even number case we can say answer will be the middle number . To understand better lets take one example.

Ex: Find the average of   68 , 70 , 72, 74 , 76

Ans : Based on the above point we can say answer is 72

Ex: Find the average of   126 , 128 , 130 , 132

Ans : Based on the above point we can say answer is 129

Consecutive even number:  x , x+2 , x+4 , x+6 ,...............

          Here x will be odd number

Note :in the above consecutive odd number case we can say answer will be the middle number . To understand better lets take one example.

Ex: Find the average of   97 , 99 , 101, 103 , 105

Ans : Based on the above point we can say answer is 101

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