Yes. The mean of 1, 3, and 5 is 3. The mean is the average. Add all numbers and then divide by how many numbers were added. In this case there were three numbers (1, 3, 5). 1+3+5=9. 9/3=3.
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The set {1,10,10} is one possible answer.The set {1,10,10} is one possible answer.The set {1,10,10} is one possible answer.The set {1,10,10} is one possible answer.
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There are infinitely many sets. One possible set is {10,10,12,13,15}
It's possible. An outlier is a number that affects the the mean of a group of numbers greatly. For example the mean in this set of numbers (2, 4, 1, 5) is 3, but if I add the number 93 the new answer is 21.
I believe you mean range, and it is the set of all possible values that a function can take.