Hi dw, draw yourself a Karnaugh Map. You'll find
28% of drivers involved in a fatal car crashes were between 20-29
39% of drivers in a fatal car accident had a blood alcohol of at least 0.01
In what % of fatal crashes were the drivers between 20-29 and found to have a blood alcohol level greater than 0.01?
However, the solution is .1092. How did the book get this answer?
. In fact, . Big difference between these two probabilities and obviously there's not enough information to calculate a conditional probability.
In fact, the question requires you to calculate . The book's answer has been calculated assuming independence of these two events ....