Mothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Five hundred accidents that occurred on a Saturday night were analyzed. Two items noted were the number of vehicles involved and whether alcohol played a role in the accident. The numbers are shown below:

Question

Mothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Five hundred accidents that occurred on a Saturday night were analyzed. Two items noted were the number of vehicles involved and whether alcohol played a role in the accident. The numbers are shown below:
 
                                                        Number of Vehicles Involved
Did alcohol play a role?
1
2
3
 
Yes
60
110
30
200
No
40
215
45
300
 
100
325
75

What proportion of accidents involved more than one vehicle?  Place your answer, rounded to 2 decimal places, in the blank. For example, 0.23 is a legitimate entry.