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Sources of Solid Waste, by Weight, in the United States
Year 1988
Total weight: 160 million tons
Projected Year 2000
Total weight: T million tons
Note: This data was compiled prior to the year 2000.
Year 1988
Total weight: 160 million tons
Projected Year 2000
Total weight: T million tons
Note: This data was compiled prior to the year 2000.
For 1988, how many of the eight categories of solid waste had a weight that exceeded the average (arithmetic mean) weight for all eight categories?
答案：B
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