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1道SAT数学难题
日期:2013-03-21 16:42

(单词翻译:单击)

  下面为大家搜集了1道SAT数学难题,供大家在备考的时候进行适当的准备。解答SAT数学难题可以比常规的题目更加容易了解SAT数学考试的出题思路和方法。下面我们来看看详细内容吧。

  Read the following SAT test question and then click on a button to select your answer.  

  The table above shows the attendance at the home games of the Central High School football team. If the median attendance for the five games was , and no two games had the same attendance, what is the greatest possible value for ?

  Answer Choices

  (A)

  (B)

  (C)

  (D)

  (E)

  The correct answer is B

  Explanation

  The median of five numbers can be found by putting the numbers in increasing order and picking the middle, or third, number from the list. Putting the four numbers you know in increasing order produces the following list:

  Thus, if is less than or equal to , the list of the numbers in increasing order will be

  In either case, the median will be . However, if is greater than , the list of numbers in increasing order will be or or

  In these cases, the median will be eitheror . Since you know that the median is , it must be true that is less than or equal to . Also, since no two games had the same attendance, the number cannot be equal to . Therefore, the greatest possible value of is .

  以上就是这道SAT数学难题的全部内容,后面附有详细的答案解析。大家可以在备考自己的SAT数学考试的时候,进行适当的参考和借鉴之用。

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