AMC 8 1987 Problem 18
AMC8 1987 年第 18 题
比与比例★★★☆☆
Half the people in a room left. One third of those remaining started to dance. There were then 12 people who were not dancing. The original number of people in the room was
房间中一半的人离开了。剩下的人中有三分之一开始跳舞。此时有 12 人没有跳舞。房间里原来的人数是
- A.24
- B.30
- C.36
- D.42
- E.72
正确答案 · Correct Answer
C
解析 · Solution
解析整理中
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