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The 10 households on a certain street have household incomes that range from $34,000 to $150, 000 and an average (arithmetic mea
The 10 households on a certain street have household incomes that range from $34,000 to $150, 000 and an average (arithmetic mea
admin
2009-05-19
51
问题
The 10 households on a certain street have household incomes that range from $34,000 to $150, 000 and an average (arithmetic mean) household income of $ 60,000. If the household with the highest income and the one with the lowest income are excluded. What is the average household income for the remaining 8 households?
选项
A、$41,600
B、$47,000
C、$52,000
D、$61,000
E、$75,000
答案
C
解析
某一街道上10个家庭的家庭收入在34,000美元至150,000美元之间,平均(算术平均)家庭收入为60,000美元。若把收入最高的家庭和收入最低的家庭排除在外,那么剩余8个家庭的平均收入是多少?
解:本题的正确答案是(C)。由题意可得:(60000×10 - 34000 - 150000)÷8=52,000美元
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