3 The probability that the school bus is on time on any particular day is 0.6 . If the bus is on time the probability that Sam the driver gets a cup of coffee is 0.9 . If the bus is not on time the probability that Sam gets a cup of coffee is 0.3 .
- Find the probability that Sam gets a cup of coffee.
- Given that Sam does not get a cup of coffee, find the probability that the bus is not on time.