Question

Northside 的鼓号队为旅行筹款。鼓手和号手分别记录销售额。根据下面的双条形图，哪个月份中一个小组的销售额超过另一个小组的百分比最大？

Northside's Drum and Bugle Corps raised money for a trip. The drummers and bugle players kept separate sales records. According to the double bar graph of monthly sales below, in what month did one group's sales exceed the other's by the greatest percent?

一月

Jan

二月

Feb

三月

Mar

四月

Apr

五月

May

答案：B

知识点：数据与图表解读百分数

难度评级：1130

解答：

从图上读出（鼓手，号手）的销售额：一月 $(7, 9)$ ，二月 $(5, 3)$ ，三月 $(9, 6)$ ，四月 $(9, 12)$ ，五月 $(8, 10)$ 。

较大值超过较小值的百分比分别为：一月 $\tfrac{2}{7} \approx 29\%$ ，二月 $\tfrac{2}{3} \approx 67\%$ ，三月 $\tfrac{3}{6} = 50\%$ ，四月 $\tfrac{3}{9} \approx 33\%$ ，五月 $\tfrac{2}{8} = 25\%$ 。最大的是二月，此时 $5$ 比 $3$ 大约 $67\%$ 。

所以正确答案是 B。

Reading the graph gives (drums, bugles): January $(7, 9),$ February $(5, 3),$ March $(9, 6),$ April $(9, 12),$ and May $(8, 10).$

The percent excess of the larger over the smaller is $\tfrac{2}{7} \approx 29\%$ in January, $\tfrac{2}{3} \approx 67\%$ in February, $\tfrac{3}{6} = 50\%$ in March, $\tfrac{3}{9} \approx 33\%$ in April, and $\tfrac{2}{8} = 25\%$ in May. The greatest is February, where $5$ exceeds $3$ by about $67\%.$

Thus, the correct answer is B .

1992 AMC 8 第 21 题

答案：B

难度评级：1130

解答：

其他年份的第 21 题