Two women in library the librarian assist the other women to help in her research .
There is a better than even chance that a librarian is helping a student find what she needs for her homework .
There is a better than even chance that a librarian is helping a student find what she needs for her homework .
It is highly unlikely that a librarian is helping a student find what she needs for her homework .
A librarian is helping a student find what she needs for her homework .