A group of people were asked if they had run a red light in the last year. 238 responded "yes", and 196 responded "no".
Find the probability that if a person is chosen at random, they have run a red light in the last year
To find the probability that a person chosen at random from the group has run a red light in the last year, we need to divide the number of people who have run a red light by the total number of people in the group.
In this case, the number of people who responded "yes" to running a red light is 238. The total number of people in the group is the sum of the number of people who responded "yes" and the number of people who responded "no", which is 238 + 196 = 434.
Therefore, the probability is calculated as:
Probability = Number of people who have run a red light / Total number of people in the group
Probability = 238 / 434 ≈ 0.548
So, the probability that if a person is chosen at random, they have run a red light in the last year is approximately 0.548 or 54.8%.
P(yes) = (#yes)/(total #)
However, that assumes that the group were randomly chosen, and that they told the truth. Just because they said yes, that does not mean they actually ran a red light.
The problem is very poorly worded.