[求助]大全-6-18,大全-6-19

wildmantomba

Premise1: The value of a product is determined by the ratio of its quality to its price.（Value=Quality/Price）
Premise2: The higher the value of a product, the better will be its competitive position. （value increase=better cp）


Conclusion: Therefore, either increasing the quality or lowering the price of a given product will increase the likelihood that consumer will select that product rather than a competing one.

Which of the following, if true, would most strengthen the conclusion drawn above?

(A) It is possible to increase both the quality and the price of a product without changing its competitive position.
不管是Value=Quality/Price或是Value=Price/Quality都可以推出上述结论，故A不对

zxppx

In January there was a large drop in the number of new houses sold, because interest rates for mortgages were falling and many consumers were waiting to see how low the rates would go. This large sales drop was accompanied by a sharp rise in the average price of new houses sold.
Which of the following, if true, best explains the sharp rise in the average price of new houses?
(A)Sales of higher-priced houses were unaffected by the sales drop because their purchasers have fewer constraints limiting the total amount they pay.
Higher-priced houses对抬高平均房价的作用比较大，所以如果购买它们的顾客没有因为贷款利率下降而减少购买，那么平均房价可能就会大幅度上涨

平均房价=(higher-priced houses数量X价格 + lower-priced houses数量X价格)÷总数量

其中，前者的数量不变（unaffected by the sales drop）,后者的数量下降（interest rates were falling）,所以平均房价会上涨，即使总的销售数量下降