The probability Barry is either on time for school or there is no sick
passenger on the train is 8/9. The probability Barry will be late for school if
there’s a sick passenger on the train is 2/3. Find the probability
(a)Barry is late for school and there is a sick passenger on the train.
(b) there is a sick passenger on the train.
is part a 1/9 * 2/3? and im not sure what to do for b