Probability of a

Question

The table summarizes results from 988 pedestrian deaths that were caused by automobile accidents.

Driver	Pedestrian Intoxicated? YES	Pedestrian Intoxicated? NO
Yes	41	79
No	268	600

If two different pedestrian deaths are randomly selected, find the probability that they both involved drivers that were not intoxicated.

Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.

prob = %

Answer 1

Hi,

First we can see that the number of non - intoxicated drivers is 868, out of a total of 988 auto-accident deaths.

So the probability that a driver is not intoxicated is 868/988 which is approximately 88%.

Now assuming that the two pedestrian deaths are independent from each other, as in one death doesn't affect the probability of the other. Then the probability that both pedestrian deaths resulted from non-intoxicated drivers is .88 x .88 = about 77%

**values rounded to closest whole number