2. 外语
  3. Mrs. Jones sold two houses for $80, 000 each. One house was sold at a 20 percent loss and the other at a 20 percent gain. Colum

Mrs. Jones sold two houses for $80, 000 each. One house was sold at a 20 percent loss and the other at a 20 percent gain. Colum

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问题 Mrs. Jones sold two houses for $80, 000 each. One house was sold at a 20 percent loss and the other at a 20 percent gain.

Column A                         Column B
The gain minus the loss           0
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案B
解析 琼斯太太以每幢$80,000的价格卖了两幢房屋。一座房子以亏损20％售出，另一座房子以赢利20％售出。
解：本题的正确答案是(B)。两幢房子一幢亏损，一幢赢利，但最后的售价相同，这说明它们的原价一定不同，设亏损房屋价为x，获利房屋价为y，则由题意可得：x(1-20%)=80000 → x=80000/(1-20%)；y(1+20%)=80000 → y=80000/(1+20%)； so,  x＞y → y-x＜0
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