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题目材料：
If the average (arithmetic mean) annual salary of the people currently employed in agriculture is $35,000 and if the average annual salary of the people currently employed in construction is $45,000, what is the average annual salary of the people currently employed in agriculture and construction combined?
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A.$37,500
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B.$42,500
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C.$40,000
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D.$40,500
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E.$43,000
E显示答案
