Question

Whats is average of the series 11,22,33,....,1100

Answer 1

11 is the average of series I think so..

Answer 2

Answer:

Average of the series 11,22,33,....,1100 is 49.5

Step-by-step explanation:

For solving this type of question, we have to follow some small tricks.  

11 + 22 + 33 + 44 +................... 1100

= 11 * (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10)

[ we take 11 as common number from each number ]

= 11 * [ (4+6) + (2+8) + (1+9) + (3+7) + 5 + 10 ]  

= 11 * 55

= 605  

Average = 605 / 10 = 60.5

So, the final result is 60.5.