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Language/Type: C++ Vector collections
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Author: Eric Roberts and Marty Stepp (on 2016/06/16)

Write a function named mean that accepts as a parameter a reference to a Vector of real numbers, and returns the arithmetic mean (average) of the integers in the vector as a real number. For example, if the vector passed contains {2.0, 4.5, 6.5, 1.0}, your function should return 3.5. If the vector is empty, return 0.0. Do not modify the vector that is passed in.

Type your C++ solution code here:

This is a function problem. Write a C++ function as described. Do not write a complete program; just the function(s) above.

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