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During a study of auto accidents, the Highway Safety Council found that 300 accidents occurred in a given month. They reported that 210 accidents occurred

During a study of auto accidents, the Highway Safety Council found that 300 accidents occurred

in a given month. They reported that 210 accidents occurred at night, 140 are alcohol related, and

45 accidents occurred at day and non-alcohol related.

(a) What is the probability that an accident occurred at night, given that it was alcohol-related?

(b) What is the probability that an accident occurred at night or alcohol-related?

(c) Are the accidents occurred at night and alcohol related are independent?

(d) What is the probability that an accident occurred at night and alcohol-related?

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