选择题
2025 AMC 8 Problem 17: Markovia
In the land of Markovia, there are three cities: A, B, and C. There are 100 people who live in A, 120 who live in B, and 160 who live in C. Everyone works in one of the three cities, and a person may work in the same city where they live. In the figure below, an arrow pointing from one city to another is labeled with the fraction of people living in the first city who work in the second city. (For example, 1/4 of the people who live in A work in B.) How many people work in A?
2025 AMC 8 第 17 题：马尔科夫
在马尔科维亚的土地上，有三个城市：A、B、C。有 100 人住在 A，有 120 人住在 B，还有 160 人住在 C。每个人都在三个城市之一工作，并且一个人可能在所居住的同一个城市工作。在下图中，从一个城市指向另一个城市的箭头标记了居住在第一个城市但在第二个城市工作的人口比例。 （例如，居住在 A 的人有 1/4 在 B 工作。） 有多少人在 A 工作
A.
55
B.
60
C.
85
D.
115
E.
160