2002 AMC 10A Problems/Problem 9
Problem
There are 3 numbers A, B, and C, such that , and . What is the average of A, B, and C?
More than 1
Solution
Notice that we don't need to find what A, B, and C actually are, just their average. In other words, if we can find A+B+C, we will be done.
Adding up the equations gives so and the average is . Our answer is .