2003 AMC 8 第 7 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
7.
Blake 和 Jenny 各参加了四次 分测试。Blake 四次测试平均分为 。Jenny 第一次测试比 Blake 高 分，第二次比他低 分，第三次和第四次都比他高 分。Jenny 的平均分和 Blake 的平均分相差多少？
Blake and Jenny each took four -point tests. Blake averaged on the four tests. Jenny scored points higher than Blake on the first test, points lower than him on the second test, and points higher on both the third and fourth tests. What is the difference between Jenny’s average and Blake’s average on these four tests?
答案：A
小提示：
把 Jenny 四次分数相对 Blake 的差值相加
Add Jenny’s four score differences from Blake’s.
大提示：
将总差值除以 来比较平均分
Divide the total difference by to compare averages.
解答：
两人四次测试的总分差为 所以平均分之差为 。
所以正确答案是 A。
The total point difference between the two is The average of this difference is
Thus, A is the correct answer.
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