The element that occurs most frequently in a given set.

For example, the mode of {1, 22, 4, 4, 3, 5} is 4. Not all sets have modes. In statistics, the mode is used to determine the advertising target for a product. For example, if it were found that the modal age range of people buying a specific type of music cd was 20 - 25, the advertisements for this type of music cd should target this age group.

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