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What was the price at which a merchant sold a certain appliance? (1) The merchant’s gross profit on the appliance was 20 percent of the price at which the merchant sold the appliance. (2) The price at which the merchant sold the appliance was $50 more than the merchant’s cost of the appliance.
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. 答案选C为什么呢，设price是x,根据条件(1)得出，gross profit是0.2x; 根据条件（2）得出，cost是x-50;
两条件相加price 是 0.2x+x-50等于1.2x-50; x还是未知数，为什么选c,大家讨论看看 | 
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发表于 2008-7-19 22:41:00
