SOLUTION: The average arithmetic mean of a list of 8 numbers is 6, and the average of a separate list of 4 numbers is 71. What is the average of all 12 numbers? the answer is 65 but i dont

Algebra ->  Average -> SOLUTION: The average arithmetic mean of a list of 8 numbers is 6, and the average of a separate list of 4 numbers is 71. What is the average of all 12 numbers? the answer is 65 but i dont       Log On


   

Question 976733: The average arithmetic mean of a list of 8 numbers is 6, and the average of a separate list of 4 numbers is 71. What is the average of all 12 numbers?
the answer is 65 but i dont know why
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The average arithmetic mean of a list of 8 numbers is 6, and the average of a separate list of 4 numbers is 71.
:
I don't get 65, here's my take on this
:
What is the average of all 12 numbers?
a = %28%288%286%29%2B4%2871%29%29%29%2F12
a = %28%2848%2B284%29%29%2F12
a = 332%2F12
a = 272%2F3