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Number of Vehicles Involved 1 2 3 Totals Did alcohol play a role? Yes 75 150 50 275 No 25 125 75 225 Totals 100

Number of Vehicles Involved

1

2

3

Totals

Did alcohol play a role?

Yes

75

150

50

275

No

25

125

75

225

Totals

100

275

125

500

Given alcohol was involved, what proportion of accidents involved a single vehicle?

Given that multiple vehicles were involved, what proportion of accidents involved alcohol?

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