Question

The table summarizes results from pedestrian deaths that were caused by automobile accidents.Pedestrian DeathsDriver Pedestrian Intoxicated?Intoxicated?YesNoYes5474No288568If one of the pedestrian deaths is randomly selected, find the probability that the driver was notintoxicated.Probability =(Please enter a decimal rounded to 4 decimal places.)CalculatorScratchwork Area

Answer 1

Add the numbers in each row to find the total amount of pedestrian deaths when the driver was intoxicated or not, regardless of the state of the pedestrian:

Driver intoxicated:

$54+74=128$

Driver not intoxicated:

$288+568=856$

Add both totals to find the total amount of pedestrian deaths:

$128+856=984$

To find the probability that the driver was not intoxicated, divide the total amout of not-intoxicated driver pedestrian deaths over the total amoun of pedestrian deaths:

$\frac{856}{984}=0.8699\ldots\text{.}$

Therefore, if a dead pedestrian is randomly selected, the probability that the driver was not intoxicated is:

$0.8699$