At jones college, there are a total of 100 students.
if 30 of the students have cars on campus, and 50
have bicycles, and 20 have both cars and bicycles,
then how many students have neither a car nor a
bicycle on campus?

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m