Answer :
Concept
The probability is the extent to which an event is likely to occur, measured by the ratio of the favorable cases to the whole number of cases possible.
Given:
483 responded yes
147 responded no
The total number of respondents are:
[tex]\begin{gathered} =\text{ 483 + 147} \\ =\text{ 630} \end{gathered}[/tex]The probability of an event e can be calculated using the formula:
[tex]\text{Probability of an event =}\frac{Number\text{ of required outcomes}}{Total\text{ number of possible outcomes}}[/tex]Required:
The probability that if a person is chosen at random, they have run a red light in the last year
Substituting we have:
[tex]\begin{gathered} P\text{ =}\frac{Number\text{ of people that responded yes}}{Total\text{ number of respondents}} \\ =\text{ }\frac{483}{630} \\ \end{gathered}[/tex]