Question

图中显示一周内 Asha（左柱）和 Sasha（右柱）每天学习的分钟数。平均每天 Sasha 比 Asha 多学习多少分钟？

The graph shows the number of minutes studied by both Asha (left bar) and Sasha (right bar) in one week. On the average, how many more minutes per day did Sasha study than Asha?

$6$

$8$

$9$

$10$

$12$

答案：A

知识点：数据与图表解读平均数

难度评级：1020

解答：

可以通过每天的差值来计算平均分钟数之差。

从星期一开始，Sasha 与 Asha 的差值分别为 $10$ 、 $-10$ 、 $20$ 、 $30$ 、 $-20$ 。总差为 $30$ 分钟，因此平均差为 $30 \div 5 = 6$ 。

所以正确答案是 A。

We can calculate the difference in average minutes by looking at the differences per day.

Starting with Monday, the differences between Sasha and Asha are $10,$ $-10,$ $20,$ $30,$ and $-20.$ This is a total of $30$ minutes. Therefore, the average difference is $30 \div 5 = 6.$

Thus, A is the correct answer.

2011 AMC 8 第 11 题

答案：A

难度评级：1020

解答：

其他年份的第 11 题