Question

8. A group of people were asked if they had run a red light in the last year. 145 responded "yes" and 124 responded "no." Find the probability that if a person is chosen at random from this group, they have run a red light in the last year.

Answer 1

In order to know the asked probability, we need to divide the number of people who answered "yes" (145) by the total number of people in the whole group.

The total number of people is the sum of those who responded "yes" (145) and those who responded "no" (124):

total = 145 + 124 = 269

So, the probability P that if a person is chosen at random from this group, they have run a red light in the last year is:

`P=(145)/(269)\cong0.539`

We can write it as the percentage:

P ≅ 53.9%

The exact answer is the fraction:

`(145)/(269)`