00:01
In this question, you are giving an exponential distribution of job processing times.
00:07
Now let ftp be the distribution.
00:14
Here, tall is 10 minutes, which is the average job processing time.
00:20
Now imagine you already have a job that has run for 90 minutes.
00:27
Then how many minutes more would you expect to finish? so you know, basically, if you look at this distribution, it goes down like this, and it's very well to have a job that's already run 90 minutes.
00:45
But although it's very well, there's still the possibility that it's going to run longer.
00:51
So basically, what you need to calculate is the average processing time for jobs falling in this range, right? in other words, for jobs running over 90 minutes, the average processing time is actually given by, you have to integrate, of course, from t to infinite...