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Question
On a recent holiday evening, a sample of 500 drivers was stopped by the police. Three hundred were under 30 years of age. A total of 250 were under the influence of alcohol. Of the drivers under 30 years of age, 200 were under the influence of alcohol.Let A be the event that a driver is under the influence of alcohol.
Let Y be the event that a driver is less than 30 years old.
a. Determine P(A) and P(Y).
b. What is the probability that a driver is under 30 and notunder the influence of alcohol?
c. Given that a driver is notunder 30, what is the probability that he/she is under the influence of alcohol?
d. What is the probability that a driver is under the influence of alcohol if we know the driver is under 30?
e. Show the joint probability table.
f. Are A and Y mutually exclusive events? Explain.
g. Are A and Y independent events? Explain.
Answer
This answer is hidden. It contains 107 characters.
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