SOLUTION: Hello. can you please help me solve this problem?? The average of five numbers is 9. The average of 7 other numbers is 8. What is the average of all 12 numbers? Thank you!

Algebra ->  Average -> SOLUTION: Hello. can you please help me solve this problem?? The average of five numbers is 9. The average of 7 other numbers is 8. What is the average of all 12 numbers? Thank you!      Log On


   

Question 341640: Hello. can you please help me solve this problem??
The average of five numbers is 9. The average of 7 other numbers is 8. What is the average of all 12 numbers?
Thank you!
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The average of five numbers is 9. The average of 7 other numbers is 8. What is the average of all 12 numbers?
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5 x avg of 9 = 45 total
7 x avg of 8 = 56 total
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avg of all 12 = (45 + 56)/12 = 101/12
= 8.416666...