1. ## Kind of stuck.

What throws me off is how it is set up, for example, looking at Driver on the left then Seeing Pedestrian in the middle. It says Intoxicated, I am not exactly sure which one to really count and which one to count as intoxicated and which one not. Sorry if that sounds confusing.

2. ## Re: Kind of stuck.

Try $\displaystyle \frac{91+97+226}{91+97+226+520}$

3. ## Re: Kind of stuck.

Originally Posted by pickslides
Try $\displaystyle \frac{91+97+226}{91+97+226+520}$
Thanks, I kind of know that, but what really confuses me is 97 and 226 read both as intoxicated and not intoxicated. For example, the 226, for example when you look above the 91, it states intoxicated, but when you look to the left of it, it says not intoxicated. How exactly am I suppose to read what is intoxicated and what is not? The 97 is the same issue above it states not intoxicated but when you look to the left of it(next to 91) it states intoxicated.

Sorry if that sounded confusing.

4. ## Re: Kind of stuck.

The question asks for the cases where either the pedestrian was intoxicated (but not the driver) or the driver was intoxicated (but not the pedestrian) or when they were both intoxicated. Of course, the question didn't use all of those words. It just stated OR which means that it is the union of these two events (ie: those 3 cases I wrote out).

The 226 entry represents the number of pedestrians that were killed while the driver was not intoxicated but the pedestrian was intoxicated - so this entry is part of the union. Similar with the entry 97 entry except it is the driver that was intoxicated and the pedestrian was not.

5. ## Re: Kind of stuck.

I see, thank you.