The columns represent length of customer loyalty in years, Ask an Expert

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Are customers more loyal in the East or in the West? The following table is based on information from Trends in the United States, published by the Food Marketing Institute, Washington, D.C. The columns represent length of customer loyalty (in years) at a primary supermarket. The rows represent regions of the United States.What is the probability that a customer chosen at random. Has been loyal 10 to 14 years?

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