Case Study

Production Decision at a Coffee Shop

The manager of a coffee shop is analyzing the productivity of their baristas during the morning rush. With 3 baristas, they serve a total of 90 customers per hour. After adding a 4th barista, they serve a total of 116 customers per hour. The manager correctly calculates that the average number of customers served per barista has decreased with the addition of the fourth worker. Based on this information, what can you conclude about the productivity of the 4th barista specifically, relative to the average productivity of the original 3 baristas? Justify your conclusion using the general principle that connects an additional unit's contribution to an existing average.

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Updated 2025-08-15

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