TELEPHONE T RUN KING PROBLEMS 



479 



i^r 



PROBABILITY RBSEAKCH 



Delayed Service Formulas 

 Varying Holding Tiae* 



* Law of holding time variation as- 

 sumed is that the probability of the 

 holding time having a length greater 

 than t i3 given by the formula 

 where e is the base of Napierian. 

 Locarithms and h is the average holding 



