求助新东方绿皮书数学118题,不明白意思!!!
C
新东方绿皮书118题
题目中的图贴不上来,就是好多箭头代表交通的方向,有x,y两个出口.麻烦各位nn帮我指路,不胜感激!!! Y
The figure above represents a system of roads along which traffic flows in the direction indicated by the arrows. If the traffic were to split evenly at each fork of the road system, what percent of the traffic entering fork C would exit at Y?
A. 87.5%
B. 75%
C. 62.5%
D. 50%
E. 12.5% | 
