Explanation
Correct answer: C.
Choice C is correct. The table shows that for a certain region in , the average number of store employees in warehouse stores was and the average number of store employees in supermarkets was . Subtracting from yields , or . Therefore, the average number of store employees was greater in warehouse stores than in supermarkets.
Desmos solution:
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Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice A
Choice A is incorrect. For this region in , this is how much greater the average number of store employees was in department stores than in supermarkets.
Choice B
Choice B is incorrect. For this region in , this is how much greater the average number of store employees was in warehouse stores than in department stores.
Choice D
Choice D is incorrect. For this region in , this is the sum of the average number of store employees in warehouse stores and in supermarkets.