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Texting while driving is a problem. Maryland Department of Motor Vehicles commissioned a study and found on average 400 accidents occur on the DC beltway every two weeks. The data is given next:
Number of Vehicles Involved in the Accident
Texting while Driving
1
2
3
Yes
50
100
20
170
No
25
175
30
230
75
275
400
a. What proportion of accidents involved more than one vehicle?
b. What proportion of accidents involved texting and a single vehicle?
c. Given that multiple vehicles were involved, what proportion of accidents involved texting?
d. Given that 3 vehicles were involved, what proportion of accidents involved texting?
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