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The average of 3 numbers is 14. The average of 2 of the numbers is 19. What is the third number?
Since the average of the three numbers is 14, then the sum of the 3 numbers is: 3 * 14, or 42
Since the average of 2 of the three numbers is 19, then the sum of 2 of the 3 numbers is: 2 * 19, or 38
The third number is: 42 - 38, or
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