1986 AJHSME Problems/Problem 11
Problem
If means , then is
Solution
You might have realized that gets you the average of A and B. If you're good at averages, you'll immediately realize that the average of and is , and the average of and is .
If means , then is
You might have realized that gets you the average of A and B. If you're good at averages, you'll immediately realize that the average of and is , and the average of and is .
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