In: Statistics and Probability
An insurance company believes that 30% of drivers are careless. The probability that a careless driver will have an accident in any one-year period is 0.4. The probability that a careful driver will have an accident in any one-year period is 0.2. Find the probability that a driver will have an accident next year given that she has had an accident this year.
P(accident )=P(careless and accident)+P(careful and accident)=0.3*0.4+0.7*0.2=0.26
therefore probability that a driver will have an accident next year given that she has had an accident this year
=P(accident next year|careless)*P(careless|accident)+P(accident next year|careful)*P(careful|accident)
=0.4*(0.3*0.4/0.26)+0.2*(0.7*0.2/0.26)=0.2923