Police Estimate That in One City 48% of Drivers Wear

Multiple Choice

Police estimate that in one city 48% of drivers wear their seat belts.They set up a safety roadblock,stopping cars to check for seat belt use.If they stop 70 cars during the first hour,what is the mean number of drivers expected to be wearing their seat belts?

A) 4.18
B) 17.47
C) 33.6
D) 36.4
E) 35