Solutions for Mean Mode

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This challenge requires you to determine if the mean is equal to the mode of an array. The **mean** is the average of the array, in other words, all the numbers added up and divided by the number of elements. The **mode** is the element that appears most often in the array. For example, if the array were [5, 3, 3, 3, 1] your program should return **1** because the mean is 3 and the mode is 3. If they are not equal your program should return **0**.
To solve this we'll calculate the mean and mode separately by looping through the array, and then compare the answers. To calculate the mode we'll use a data structure similar to the one we created in a previous challenge.

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