(b) {fewer than three lines are in use} 0.46 (c) {at least three lines are in use} 0.54 (d) {between two and five lines, inclusive, are in use} 0.71 (e) {between two and four lines, inclusive, are not in use} 0.25 (f) {at least four lines are not in use} 0.25

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Can someone please explain it to me why part e and f is wrong??? I need help for e and f ASAP??!!!
(b) {fewer than three lines are in use}
0.46
(c)
{at least three lines are in use}
0.54
(d) {between two and five lines, inclusive, are in use}
0.71
(e) {between two and four lines, inclusive, are not in use}
0.25
(f) {at least four lines are not in use}
0.25
Transcribed Image Text:(b) {fewer than three lines are in use} 0.46 (c) {at least three lines are in use} 0.54 (d) {between two and five lines, inclusive, are in use} 0.71 (e) {between two and four lines, inclusive, are not in use} 0.25 (f) {at least four lines are not in use} 0.25
A mail-order company business has six telephone lines. Let X denote the number of lines in use at a specified time. Suppose the pmf of X is as given in the accompanying
table.
0 1
3 4 5
P(x) 0.11 0.15 0.20 0.25 0.19 0.07 0.03
Calculate the probability of each of the following events.
(a) {at most three lines are in use}
0.71
(b) (fewer than three lines are in use}
0.46
(c)
{at least three lines are in use}
0.54
(d) (between two and five lines, inclusive, are in use}
0.71
Transcribed Image Text:A mail-order company business has six telephone lines. Let X denote the number of lines in use at a specified time. Suppose the pmf of X is as given in the accompanying table. 0 1 3 4 5 P(x) 0.11 0.15 0.20 0.25 0.19 0.07 0.03 Calculate the probability of each of the following events. (a) {at most three lines are in use} 0.71 (b) (fewer than three lines are in use} 0.46 (c) {at least three lines are in use} 0.54 (d) (between two and five lines, inclusive, are in use} 0.71
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