2. 职称英语
  3. A store bought 5 dozen lamps at ＄30 per dozen and sold them all at ＄15 per lamp．

A store bought 5 dozen lamps at ＄30 per dozen and sold them all at ＄15 per lamp．

游客2025-02-27  12
问题 A store bought 5 dozen lamps at ＄30 per dozen and sold them all at ＄15 per lamp．The profit on each lamp was what percent of its selling price?
选项 A、20％
B、50％
C、
D、100％
E、500％
答案 C
解析 For this problem it is especially important to keep your focus on what is asked and to ignore extraneous details.
The cost per lamp is $30/dozen=$30/12 and the selling price per lamp is $15, so the profit per lamp is $ (15-30/12). Therefore, for each lamp the profit as a percent of the selling price is
The correct answer is C.
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