B.n-3
C.n-1
D.n+2
E.n+5
答案:E
49.If the range of the six measurements 140, 125, 180, 110, 165, and x is 80, which of the following could be the value of x?
A.60
B.85
C.190
D.220
E.245
答案:C
50.The 10 households on a certain street have household incomes that range from $34,000 to $150,000 and an average 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?
A.$41,600
B. $47,000
C. $52,000
D. $61,000
E. $75,000
答案:C
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