<PRE><B>Question 71373</B>
The following was gathered on the driving records of 100 drivers over the past year.  The results are summarized in the table below Kilometers driven per year (100 drivers)
                     Less than 20,000  20000 to 50000  more than 50000   total
                                         inclusive
accident during
past year                5                   10              15           30

no accident during       15                  20              35           70
past year
Total                    20                  30              50          100

If an individual is selected at random from the group above, determine the probability that the person
a) was in an accident during the past year.Ans: 30/100
b) drove less than 20,000 km or more than 50,000 km. Ans: (20+50)/100=70/100
c) was in an accident during the past year and drove more than 50,000 km.
Ans: 15/100
d) did not have an accident, given they had driven between 20,000 km and 50,000 km last year. Ans: 20/30
e) drove more than 50,000 km, given that they did not have an accident.
Ans: 35/70
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Cheers,
Stan H.

                                                                                                          

                                                          
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