Exercise: The probability that a regularly scheduled flight departs on time is PD) = 0.83; the

Question

probability that it arrives on time is P(A) =0.82; and the probability that it departs and arrives on
time is PDA) = 0.78. Find the probability that a plane (a) arrives on time, given that it departed
on time, and (b) departed on time, given that it has arrived on time.