In a certain office , 1/3 of the workers are women, 1/2 of the same are married and 1/3 of the married women have children. If 3/4 of the men married and 2/3 of the married men have children, then what part of worker are without children?
1. 5/18
2. 4/9
3. 11/18
4. 17/36