GWD21-21

nicboy

    

Q21:

    

A store purchased a Brand C computer
for the same amount that it paid for a Brand D computer and then sold
them both at higher prices.  The store’s
gross profit on the Brand C computer was what percent greater than its
gross profit on the Brand D computer?

    

(1)   The price at which the
store sold the Brand C computer was 15 percent greater than the price at
which the store sold the Brand D computer.

    

(2)     The
store’s gross profit on the Brand D computer was $300.

    

                  

    

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.

    

Answer:

大家看这题怎么选呢，谢谢

 

psychera

选E。

设购入价为x，售出价为y。则C与D的利润之比应表示为：

(1+a)y-x

y-x

即使(1)(2)两个条件都给出，将a=15%，y-x=300代入上式，化简后只能得到：

15%x+345

300

依然无实值。

15%x+345

300

依然无实值。

psychera

选E。

设购入价为x，售出价为y。则C与D的利润之比应表示为：
    

(1+a)y-x

y-x

即使(1)(2)两个条件都给出，将a=15%，y-x=300代入上式，化简后只能得到：
                

15%x+345

300

依然无实值。

15%x+345

300

依然无实值。