Data collected from town A shows that 60% of drivers are above 30 years old. 5% of all the drivers over 30 will be prosecuted for a driving offense during a year, compared with 10% of drivers aged 30 or younger. If a driver has been prosecuted, what is the probability they are 30 or younger?
P(driver over 30)=0.6
P(driver under 30)=1-.6=0.4
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