SAT官方每日一题 Mathematics > Standard Multiple Choice Read the following SAT test question and then click on a button to select your answer. In a certain lawn-mower factory, 0.06 percent of all mowers produced are dective. On the average, there will be 3 dective mowers out of how many produced? (A) 500 (B) 1800 (C) 5000 (D) 18000 (E) 50000 答案:C Explanation Recall that 0.06 percent means 0.06 out of every 100, or 6 out of every 10000. The question asks for an equivalent ratio: 3 out of how many. The ratio 6 out of 10000 can be reduced (by dividing both members by 2) to 3 out of 5000.

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