2. 职称英语
  3. At the eating contest the winner ate an average of 15 hot dogs at the first 20 s

At the eating contest the winner ate an average of 15 hot dogs at the first 20 s

游客2023-10-20  43
问题 At the eating contest the winner ate an average of 15 hot dogs at the first 20 sittings. After a further 20 sittings the average increased to 20 hot dogs. What was the average for the last 20 sittings?
选项 A、15
B、20
C、25
D、30
答案 C
解析 前二十轮胜利者平均吃了15个热狗，一共是300个；前四十轮平均吃了20个，一共是800个。所以后20轮总共吃了500个，平均每轮是25个。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3114187.html
相关试题推荐
随机试题
最新回复(0)