2004 AMC 8 Problems/Problem 9
Problem
The average of the five numbers in a list is . The average of the first two numbers is . What is the average of the last three numbers?
Solution
Let the numbers be , and . Thus and . Since , . Substituting back into our original equation, we have and . Dividing by gives the average of .
See Also
2004 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 8 |
Followed by Problem 10 | |
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