请教，GWD重题不同答案

meteor880826

Q30:

Joanna bought only $0.15 stamps and $0.29 stamps.  How many $0.15 stamps did she buy?

(1)     She bought $4.40 worth of stamps.

(2)     She bought an equal number of $0.15 stamps and $0.29 stamps.

                  

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:

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GWD31,第一套30，答案是D,第五套也是30，答案是A

到底选什么啊，我觉得是A哦，呵呵，问一下求个放心~大家指点我下咧

Bettylee

A对，D肯定不对！lz安啦

meteor880826

呵呵，谢谢啦

千与千寻117

A

uniqnick

请教,为什么不是选C呢?感觉0.15X+0.29Y=4.4,虽说X和Y必须是正整数，但总是2元方程，需要2个等式吧~

uniqnick

不好意思，我没考虑周全，选A，没问题了~

谢谢