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The mean times three will be the total of all three numbers. Multiply the mean times three and subtract the sum of the two numbers from that total.

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How do you find the missing number in a set of numbers where the average is given?

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Well, isn't that just a happy little problem to solve! To find the missing number when the median is given, you'll want to first list all the numbers in order. Then, if the median is the middle number, you can easily identify the missing number based on whether it falls before or after the median. Just remember, there are no mistakes in math, only happy little accidents!


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