5月jj里12题和gwd-5-29答案不同，大家来告诉我到底选哪个

deepinsorrow

gwd-5-29

Leo can buy a certain computer for p₁ dollars in State A, where the sales tax is t₁ percent, or he can buy the same computer for p₂ dollars in State B, where the sales tax is t₂ percent.  Is the total cost of the computer greater in State A than in State B?

(1)     t₁ > t₂

(2)     p₁t₁ > p₂t₂

                  

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

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

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

D. EACH statement ALONE is sufficient.

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

d-5-29的答案给的是E，看到五月jj里贴出来这题说答案是C，如下：

12 ds:两个州,a州某商品价格p1,税率t1, b州p2,t2. 求该商品在那卖贵?(4月331)
   a. p1>p2   
   b. p1t1>p2t2
   lwei评价意见：C

  思路：若p1是不含税价格，卖出价P=p1(1+t1), 则p1(1+t1)-p2(1+t2)=(p1-p2)+(p1t1-p2t2)>0   

到底是什么呢，我第一次做选了E，第二次选了C，自己都不知道该选什么了

[此贴子已经被作者于2005-5-23 12:20:18编辑过]

blackhorse

同学，这根本就是两道不同的题目，所以答案不同。（条件1不一样）

依次为：E、C。

deepinsorrow

shy

deepinsorrow

种种迹象表面，我很粗心，且不适合看jj，