Ellen can purchase a certain computer at a local store at the price of p dollars and pay a 6 percent sales tax. Alternatively, Ellen can purchase the same computer from a catalog for a total of q dollars, including all taxes and shipping costs. Will it cost more for Ellen to purchase the computer from the local store than from the catalog?

(1) q - p < 50
(2) q = 1,150


Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

EACH statement ALONE is sufficient.

Statements (1) and (2) TOGETHER are NOT sufficient.

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考题讲解

Ellen同学要买电脑，有两种选择，A线下：p元加6%的税，B线上：总共消费q元。问这两种哪个划算？
其实题目是在问1.06p>q?
两个条件明显单独无法获得确定答案，我们直接来看联合：
q-p<50, q=1150 
所以1150-p<50, p>1100 那么1.06p>1100*1.06=1166>1150
所以，线下买电脑一定比线上买贵。
选择C。

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Prep2007E1-DS