XDF补充教材/CR/SECTION 1-4

4. In Millington, a city of 50,000 people, Mercedes Pedrosa, a realtor, calculated that a family with Millington’s median family income, $28,000 a year, could afford to buy Millington’s median-priced $77,000 house. This calculation was based on an 11.2 percent mortgage interest rate and on the realtor’s assumption that a family could only afford to pay up to 25 percent of its income for housing.

Which of the following corrections of a figure appearing in the passage above, if it were the only correction that needed to be made, would yield a new calculation showing that even incomes below the median family income would enable families in Millington to afford Millington’s median-priced house?

(A) Millington’s total population was 45,000 people.

(B) Millington’s median annual family income was $27,000

(C) Millington’s median-priced house cost $80,000

(D) The rate at which people in Millington had to pay mortgage interest was only 10 percent.

(E) Families in Millington could only afford to pay up to 22 percent of their annual income for housing.

答案: D 我的解释.

从问题可以看出, 这位Realtor的计算和假设中必然存在且只存在一个错误, 而这个错误导致 median income familly could not afford to buy M's median-priced house. 则要么"提高收入" 要么"降低房价"(包括房价和按揭利率) 要么"提高付出承受比例". 可以得到D.

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