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题库 / Prep2007E2-DS-199
Warehouse W's revenue from the sale of sofas was what percent greater this year than it was last year?
(1) Warehouse W sold 10 percent more sofas this year than it did last year.
(2) Warehouse W's selling price per sofa was $30 greater this year than it was last year.
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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陷阱： R=price*quantity, 条件1只说了quantity的具体变量，没有说price,但不代表price是不变的；同理，条件2只说了价格； 所以2个条件都insufficient；
再来，条件1+2, 没法得出纯数字比例，insufficient。
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