Posted by rob77 on November 07, 2002 at 00:35:12:
A doctor has scheduled 2 appointments, one at 1pm and the other at 1:30pm. The amt of time that appointments last are independent exponential random vbls w/mean 30min. Assuming that both patients are on time, find the expected amt of time that the 1:30pm spends at the doctor's office.
im stuck
let X = time 1pm appointment lasts
so i would find P{X > 30} and P{X > 30}
whut would be my next step?
thanx