If the average arthimatic mean of 8,12,15,21. x an 11 is 17 than what is x ?
If the average arthimatic mean of 8,12,15,21. x an 11 is 17 than what is x ?
Explanation
As given: (8 + 12 + 15 + 21 + x + 11)/ 6 = 17
(67+x)/6 = 17
67+x = 102
x = 102-67
x = 35