The probability that a car is red is 1/3
The given parameters are
P(Car has two doors, given that it is red) = 0.6
P(car has two doors and is red) = 0.2
The probability that a car is red is
P(Red) = P(car has two doors and is red)/P(Car has two doors, given that it is red)
This gives
p(Red) = 0.2/0.6
Evaluate
p(Red) = 1/3
Hence, the probability that a car is red is 1/3
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