Question

Zelda 在八月一日玩 Adventures of Math 游戏并得了 $1700$ 分。接下来的 $5$ 天她每天都继续玩。下方柱状图显示了每天得分相比前一天的变化量。例如，Zelda 在八月二日的得分是 $1700 + 80 = 1780$ 分。Zelda 在这 $6$ 天中的平均得分是多少？

Zelda played the Adventures of Math game on August 1 and scored $1700$ points. She continued to play daily over the next $5$ days. The bar chart below shows the daily change in her score compared to the day before. (For example, Zelda's score on August 2 was $1700 + 80 = 1780$ points.) What was Zelda's average score in points over the $6$ days?

$1700$

$1702$

$1703$

$1713$

$1715$

答案：E

知识点：数据与图表解读平均数

难度评级：1290

解答：

从 $1700$ 开始依次应用每日变化 $+80, -90, -10, +60, -40$ 。六天得分为 $1700, 1780, 1690$ 、 $1680, 1740, 1700$ 。总和为 $10290$ ，平均分为 $10290 / 6 = 1715$ 。所以正确答案是 E。

Apply the daily changes $+80, -90, -10, +60, -40$ to the starting $1700.$ The six scores are $1700, 1780, 1690,$ $1680, 1740, 1700.$ They add to $10290,$ so the average is $10290 / 6 = 1715.$ Therefore, the answer is E.

2024 AMC 10A 第 12 题

答案：E

难度评级：1290

解答：

其他年份的第 12 题