AMC 8 2011 Problem 11
AMC8 2011 年第 11 题
统计与数据图表★★★☆☆
The graph shows the number of minutes studied by both Asha (black bar) and Sasha (grey bar) in one week. On the average, how many more minutes per day did Sasha study than Asha?
下图显示了一周内 Asha（黑色长条）和 Sasha（灰色长条）的学习时间（分钟）。那么 Sasha 平均每天的学习时间比 Asha 多多少分钟？
- A.6
- B.8
- C.9
- D.10
- E.12
正确答案 · Correct Answer
A
解析 · Solution
Solution 1
Average the differences between each day. We get . We find the average of this list to get 6. ( In case you were wondering, the way to calculate the average is . So the answer is indeed 6 )
This solution may take longer to do than the first solution. In total, Asha studied for 400 minutes a week (80 minutes per day) and Sasha studied for 430 minutes a week (86 minutes per day). 86 - 80 = 6. Therefore, the answer is 6. -MiracleMaths
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