Master - ghhoward/is210_lesson_06

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Hi @ghhoward,

You have a little unnecessary duplication here. When python does mathematical operations on two different numeric types, it automatically outputs the more complex type. So, if you're adding `0.0 + 1` your result is `1.0` not `1`.  So, since total started as `0.0` it was already a float and `total / len(numbers)` would still return a float.