In a traffic study, a survey of 50 moving cars is done and it is found that $20 \%$ of these contain more than one person. Of the cars containing only one person, $60 \%$ of these are driven by women. Of the cars containing just one person, how many were driven by men?
(A) 10
(B) 16
(C) 20
(D) 30
(E) 40
In a traffic study, a survey of 50 moving cars is done and it is found that $20 \%$ of these contain more than one person. Of the cars containing only one person, $60 \%$ of these are driven by women. Of the cars containing just one person, how many were driven by men?
(A) 10
(B) 16
(C) 20
(D) 30
(E) 40

## Solution

The number of cars containing one person is $80 \%$ of 50, which is 40 . Since $40 \%$ of these 40 cars are driven by men, the number driven by men is $.4 \times 40$ or 16 . ANSWER: (B)