请教：GWD MATH 9 Q6

MOBRULE · 发表于 2011-8-30 10:09:44

Q6:
Sue’s monthly earnings consist of a monthly salary and a 4 percent commission on the portion of her monthly sales that is in excess of $2,000. If Sue’s monthly salary was the same in July as in August, how much greater were her sales in July than in August?
(1)    Sue’s monthly earnings were $3,620 in July and $3,580 in August.
(2)    Sue’s monthly salary was $3,500 in July and in August.

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.

MOBRULE · 发表于 2011-8-30 10:11:41

答案选了A，我感觉是c
因为在不给出monthly salary是多少的情况下，可以假定monthly salary 为3580,那就意味着8月的sales可以是低于2000的任何值

wyw1018 · 发表于 2011-8-30 10:19:56

有道理
GWD的答案很多错

请教：GWD MATH 9 Q6

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