The probability that it rains is about 20%. The probability that the bus is late is about 8%.
The probability that it rains and the bus is late is about 3%.
The probability that the train is late is about 5%.
The probability that it rains and the train is late is about 1%.
P(A)=0.20 P(B)=0.08 P(A n B)=0.03

what does this tell you about how rain affects the probability that the bus will be late? ​