2009 AMC 8 第 2 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。
2.
当地汽车经销店平均每卖出 辆跑车，就会卖出 辆轿车。经销店预测下个月会卖出 辆跑车。那么预计会卖出多少辆轿车？
On average, for every sports cars sold at the local car dealership, sedans are sold. The dealership predicts that it will sell sports cars next month. How many sedans does it expect to sell?
答案：D
小提示：
使用 辆跑车对应 辆轿车的比例
Use the ratio sports cars to sedans.
大提示：
从 辆跑车到 辆跑车是乘以
Going from to sports cars multiplies by
解答：
列出比例 交叉相乘得 因而
所以正确答案是 D。
Set up the proportion Cross-multiplying gives and hence
Thus, D is the correct answer.
其他年份的第 2 题
- 1985 AMC 8
- 1986 AMC 8
- 1987 AMC 8
- 1988 AMC 8
- 1989 AMC 8
- 1990 AMC 8
- 1991 AMC 8
- 1992 AMC 8
- 1993 AMC 8
- 1994 AMC 8
- 1995 AMC 8
- 1996 AMC 8
- 1997 AMC 8
- 1998 AMC 8
- 1999 AMC 8
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