HP 12C#ABA hp 12c_solutions handbook_English_E.pdf - Page 146

probabilities for this type of problem dispensing with the use of tables

Page 146 highlights

What is the average number of customers in the waiting line at any time? The average waiting time? What is the average total time for a customer to wait and be checked out? The average number of customers in the system? Keystrokes Display .5 1 0.50 .9 2 2 1 0.56 0.69 Average # customers waiting in queue. 1 1.39 Average waiting time. 2 2.50 Average total time in the system. 1 1.25 Average # customers in system. With an HP-12C program on can readily calculate the necessary probabilities for this type of problem (dispensing with the use of tables) and perform additional calculations as well. KEYSTROKES DISPLAY CLEAR 1 0 0 0 0 09 16 00- 01- 1 02-44 33 0 03-45 48 0 04- 45 0 05- 0 06- 43 34 07-43, 33 09 08-43, 33 16 09- 40 10- 21 11- 43 36 12- 43 3 13- 10 145

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145
What is the average number of customers in the waiting line at any time?
The average waiting time? What is the average total time for a customer
to wait and be checked out? The average number of customers in the
system?
With an HP-12C program on can readily calculate the necessary
probabilities for this type of problem (dispensing with the use of tables)
and perform additional calculations as well.
Keystrokes
Display
.5
1
0.50
.9
2
2
0.56
1
0.69
Average # customers waiting in
queue.
1
1.39
Average waiting time.
2
2.50
Average total time in the system.
1
1.25
Average # customers in system.
KEYSTROKES
DISPLAY
CLEAR
00-
1
01-
1
0
02-44 33
0
0
03-45 48
0
0
04-
45
0
0
05-
0
06-
43 34
09
07-43, 33 09
16
08-43, 33 16
09-
40
10-
21
11-
43 36
12-
43
3
13-
10