I got confused with the probabilities:
ABC airport has $3$ terminals: $T_1$ is for international flights, $T_2$ just for national flights and $T_3$ for regional flights. From all flights departing from the airport $10\%$ are international and $30\%$ are national flights. The probability of an international flight having a delayed departure is $0.10$; from those flights having delayed departures $20\%$ are regional flights, the probability a flight has a delayed departure is $0.05$.
a) What is the probability that a national flight, randomly chosen, has a delayed departure? b) It is known that a specific flight has had a delayed departure. From which terminal is more probable it has departed?
I have already defined events ( but I'm not sure if they are correct) $P[T_1]= 0.1$; $P[T_2]= 0.3$; $P[T_3]= 0.6$; $P[D \mid T_1]= 0.1$; $P[T3\mid D]= 0.2$; $P[D]= 0.05$, while $D$ is an event that the flight was delayed. How to solve this excersise?