SOLUTION: the average of integers a and b is 12. If c = 3, what is the average of integers a, b, and c?

SOLUTION: the average of integers a and b is 12. If c = 3, what is the average of integers a, b, and c?

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Question 335949: the average of integers a and b is 12. If c = 3, what is the average of integers a, b, and c?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
"the average of integers a and b is 12" means that . Multiply both sides by 2 to get

The average of 'a', 'b', and 'c' is . But we know that and . So we know that

So the average of 'a', 'b' and 'c' is 9.

If you need more help, email me at jim_thompson5910@hotmail.com

Also, feel free to check out my website.

Jim
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