1. The problem statement, all variables and given/known data This is a problem I have posed for myself. Suppose I have found the probability of something occurring over an angle, so it is the probability of landing at a particular angle over an interval of 2 angles. How would I now find the probability of landing there within a specific amount of time? Say I wanted to find the probability of landing on that angle over a certain time interval. So it is sort of like, an interval within a time interval. 3. The attempt at a solution I have already found the probability of it landing somewhere in the interval using a probability density function, now I want to add a time variable into the landing of it. Do I need to define some sort of constant which says what rate it is moving from point a to b on the interval?