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There are an infinite number of sets with mean 80. Here are some:

{80, 80, 80}, {80, 80, 80, 80, 80, 80}

{79, 80, 81}, {79, 79, 80, 81, 81}, {79, 79, 80, 82}

(1, 80, 159}, {-40, 200}

To produce a set of n numbers with mean 80,

start with any set of n-1 numbers. Suppose their sum is S. Then add the number 80*n-S to the set. You will now have n numbers whose sum is S+80*n-S = 80*n

So the mean of this set is 80.

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14y ago

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Q: What set of numbers has a mean of 80?
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