3.

value:

10.00 points

Problem 18-5

A small town with one hospital has 3 ambulances to supply ambulance service. Requests for ambulances during nonholiday weekends average .80 per hour and tend to be Poisson-distributed. Travel and assistance time averages 2 hours per call and follows an exponential distribution Use Table 1.

a.Find system utilization. (Round your answer to the nearest whole percent. Omit the "%" sign in your response.)

System utilization %

b.Find the average number of customers waiting. (Round your answer to 3 decimal places.)

Average number of customers

c.Find the average time customers wait for an ambulance. (Round your answer to 3 decimal places.)

Average time hour

d.If there are 3 ambulances, find the probability that all ambulances will be busy when a call comes in. (Round intermediate calculations to 3 decimal placesand finalanswer to 2 decimal places.)

Probability

rev: 07_08_2015_QC_CS-19155, 12_08_2015_QC_CS-34845