SAT数学官方考题
下面是给SAT考生整理的2013年01月16日题，SAT考生参考一下，希望可以帮助到SAT考试的考生。
考试类型: Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
The
scatterplot above shows the number of items purchased at a grocery
store by 28 customers and the total cost of each purchase. How many of
these 28 customers bought more than 10 items and spent less than $20?
A. Four
B. Five
C. Six
D. Seven
E. Eight
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正确答案:A 解析: Drawing the vertical line "Number of Items = 10" and the horizontal line "Total Cost = "$20" divides the scatterplot into four regions, as shown in the figure below.
The lower right region lies below the line "Total Cost = $20" and to the right of the line "Number of Items = 10." Thus the points in this region are exactly the points that represent a purchase of more than 10 items at a total cost of less than $20. (Note that the points on the line "Number of Items = 10" represent a purchase of exactly 10 items, not more than 10 items and, thus, do not meet the given conditions.) There are four points in the lower right region. Therefore, four of the customers bought more than 10 items and spent less than $20. |
