41. Drunks. Police often set up sobriety checkpoints- roadblocks where drivers are asked a few brief questions may have been drinking. If the officer does not suspect ercise 38, lung condition was a to allow the officer to judge whether or not the a problem, drivers are released to go on their way. Other- determine whether or not they will be arrested. The police say that based on the brief initial stop, trained offi- cers can make the right decision 80% of the time. Suppose wise, drivers are detained for a breathalyzer test theler. the police operate a sobriety checkpoint after 9 p.mo Saturday night, a time when national traffic safety evp suspect that about 12% of drivers have been drinking a) You are stopped at the checkpoint and, of course, have not been drinking. What's the probability that you are detained for further testing? b) What's the probability that any given driver will be detained? c) What's the probability that a driver who is detained has actually been drinking? d) What's the probability that a driver who was released had actually been drinking?

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You just need to solve for b, don't solve c and d I want to do it by myself. Thanks. This is for question 41 only.

yo
abil
60-year-old this condition?
roadblocks where are a c
Exercise 37, of the employeesa
to to or not p
41. Police often set up checkpoints-
ercise 38, what's the that with the
40. Lungs and Based on the in Ex
may have been If the officer does not suspect
determine or not will be The
ersity of
ical party,
tion and sme
dent of
b) What's the probabil
At the company
39. Absenteeism, part II.
jua
are on
the night shift?
Me
tiv
pund
lung condition was a smoker?
questions
to allow the officer to judge whether or not the
person
problem, drivers are released to go on their
wise, drivers are detained for a Breathalyzer test theer
determine whether or not they will be arrested. The
a
way. Other-
46. I
the police operate a sobriety checkpoint after 9 p.m.on
on a
suspect that about 12% of drivers have been drinking
a) You are stopped at the checkpoint and, of course, have
not been drinking. What's the probability that you are
detained for further testing?
b) What's the probability that any given driver will be
detained?
c) What's the probability that a driver who is detained
has actually been drinking?
d) What's the probability that a driver who was released
had actually been drinking?
42. No-shows.
purchase" fares to customers who buy tickets more u
30 days before travel and charges "regular" fares fo:
ets purchased durini l
than
Transcribed Image Text:yo abil 60-year-old this condition? roadblocks where are a c Exercise 37, of the employeesa to to or not p 41. Police often set up checkpoints- ercise 38, what's the that with the 40. Lungs and Based on the in Ex may have been If the officer does not suspect determine or not will be The ersity of ical party, tion and sme dent of b) What's the probabil At the company 39. Absenteeism, part II. jua are on the night shift? Me tiv pund lung condition was a smoker? questions to allow the officer to judge whether or not the person problem, drivers are released to go on their wise, drivers are detained for a Breathalyzer test theer determine whether or not they will be arrested. The a way. Other- 46. I the police operate a sobriety checkpoint after 9 p.m.on on a suspect that about 12% of drivers have been drinking a) You are stopped at the checkpoint and, of course, have not been drinking. What's the probability that you are detained for further testing? b) What's the probability that any given driver will be detained? c) What's the probability that a driver who is detained has actually been drinking? d) What's the probability that a driver who was released had actually been drinking? 42. No-shows. purchase" fares to customers who buy tickets more u 30 days before travel and charges "regular" fares fo: ets purchased durini l than
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