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Originally posted by Lisa

Please help me with this textbook problem. I'm practicing problems for an upcoming test and this one has stumped me me. Thanks.


New Jersey Turnpike has a posted speed limit of 60 mph. A survey of drivers on this turnpike revealed the following facts:

1. 14% of the drivers on this highway were African Americans.

2. 98% of the drivers were exceeding speed limit

3. Of these violators, 15% of the drivers were African American.

4. Of the drivers stopped for speeding by the New Jeresy police, 35% were African Americans.

Answer the following questions:

(a). Find the probability that a driver is African American and exceeding the speed limit.

(b.) Given a driver is exceeding the speed limit, what is the probability that the driver isn't African American.

(c.) Given that a driver is stopped by the New Jersey police for speeding, what is the probability that the driver isn't African American.

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