The following data summarizes results from 957 pedestrian de

The following data summarizes results from 957 pedestrian deaths that were caused by accidents. K one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was intoxicated or the driver was intoxicated.

Solution

Answer to the question)

P(Pedestrian toxication) = (89+273) / 957

P(Driver intoxication) = (89+59)/957

P(drive and pedestrian intoxication) = 89/957

.

We need to find P(driver or Pedestrian intoxication)

The formula of P(A or B) = P(A) + P(B) - P(A and B)

this is the addition rule of probability

thus P(drive or Pedestrian) = P(dirve) + P(pedestrian) - P(Driver and Pedestrian)

P(driver or pedestrian) = ((89+273)+(89+59)-89 ) / 957

P(driver or pedestrian) = 421 /957 = 0.4399