The table summarizes results from 981 pedestrian deaths that were caused by automobile accidents

Question

The table summarizes results from 981 pedestrian deaths that were caused by automobile accidents.

Driver Intoxicated	Pedestrian Intoxicated?
	Yes
Yes	51	80
No	257	593

If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was intoxicated or the driver was not intoxicated. Please enter a decimal to 4 decimal places.

BLANK CELL is no

Answer 1

Picture a Venn diagram with circles A and B. Let A be the event that the pedestrian is intoxicated, and let B be the event that the driver is not intoxicated.

The probability of A or B is the probability of their union:

P(A ∪ B) = P(A) + P(B) - P(A∩B)

=(51+257)/981 + (257+593)/981 - 257/981

=901/981

=0.9185