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We are asked to find the probability that the driver was not intoxicated in a pedestrian death, based on the given table.

The table shows the following information:

| Driver Intoxicated? | Pedestrian Intoxicated? (Yes) | Pedestrian Intoxicated? (No) | Total |
|---------------------|------------------------------|------------------------------|-------|
| Yes                 | 63                           | 80                           | 143   |
| No                  | 285                          | 562                          | 847   |
| **Total**           | **348**                      | **642**                      | **990**|

To calculate the probability that the driver was not intoxicated, we need to find:

\[
P(\text{Driver not intoxicated}) = \frac{\text{Total pedestrian deaths with non-intoxicated drivers}}{\text{Total pedestrian deaths}}
\]

From the table, the total number of deaths where the driver was not intoxicated is \(285 + 562 = 847\), and the total number of deaths is \(990\).

Thus, the probability is:

\[
P(\text{Driver not intoxicated}) = \frac{847}{990}
\]

Now let's compute this probability to four decimal places.The probability that the driver was not intoxicated, given a randomly selected pedestrian death, is \(0.8556\).

Would you like any further details or have any questions about this?

Here are some related questions you might consider:
1. What is the probability that both the driver and the pedestrian were intoxicated?
2. What is the probability that the pedestrian was not intoxicated, given that the driver was intoxicated?
3. What is the probability that the driver was intoxicated, given that the pedestrian was intoxicated?
4. What is the probability that either the driver or the pedestrian was intoxicated?
5. What is the probability that neither the driver nor the pedestrian was intoxicated?

**Tip:** To calculate conditional probabilities, you can focus on specific rows or columns in the table and divide by the relevant total (like row or column totals).

If one of the pedestrian deaths is randomly selected, find the probability that the driver was not intoxicated.

Find the probability that the driver was not intoxicated in a randomly selected pedestrian death case, using a dataset of 990 cases. This problem uses basic probability theory and is suitable for students in Grades 9-12.

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