# The probability that a train leaves on time is 0.9. The probability that the train arrives on time and leaves on time is 0.36. What is the probability that the train arrives on time, given that it leaves on time?

##### 1 Answer

Aug 1, 2016

#### Explanation:

Let

The question is what is

we know that

if the two events are not independent otherwise its just the product of the two probabilities. Since it is not independent we use this fact to derive the results