1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
FrozenT [24]
3 years ago
12

Suppose users share a 3 Mbps link. Also suppose each user requires 150 kbps when transmitting, but each user transmits only 10 p

ercent of the time. (See the discussion of packet switching versus circuit switching in Section 1.3.)
a. When circuit switching is used, how many users can be supported?
b. For the remainder of this problem, suppose packet switching is used. Find the probability that a given user is transmitting.
c. Suppose there are 120 users. Find the probability that at any given time, exactly n users are transmitting simultaneously. (Hint: Use the binomial distribution.)
d. Find the probability that there are 21 or more users transmitting simultaneously.
Computers and Technology
1 answer:
Scorpion4ik [409]3 years ago
6 0

Answer:

a) 20 users

b) 0.1  or 1/10

c) P ( X = n )   =   ^{120}C_{n} ( 0.10 )^n (0.9)^{120-n}

d) 0.008

Explanation:

Given data:

Link shared by users = 3 Mbps

each user requires ; 150 kbps

percentage transmitted by each user = 10%

a) Determine the number of users can be supported

number of users = 3 Mbps / 150 kbps = 3000 / 150 = 20 users

b) P( user is transmitting )

given that percentage transmitted by each user = 10%

since packet switching is used ; P ( user is transmitting ) = 10% = 0.1

c) P ( n users are transmitting simultaneously )

let the number of users ( i.e. N ) = 120

number transmitting = n

P ( user is transmitting ) = 0.10

<em>using Binomial distribution</em>

P ( X = n ) = ^{N}Cₙ ( P )ⁿ ( 1 - P )^^{N-n}

                = ^{120}C_{n} ( 0.10 )^n (0.9)^{120-n}

d) P( X ≥ 21 transmitting simultaneously )

P ( X = n ) = ^{120}C_{n} ( 0.10 )^n (0.9)^{120-n}

Therefore ; P( X ≥ 21 ) = 1 - P( X ≤ 20 )

                                   = 1 - BINOMDIST(20,120,0.1,1)  ( excel function )

∴ P( X ≥ 21 ) = 1 - 0.992059 ≈ 0.008

<em />

You might be interested in
#include
gavmur [86]

Answer:

See explaination

Explanation:

#include <fstream>

#include <iostream>

#include <iomanip>

using namespace std;

int main()

{

// Fill in the code to define payfile as an input file

ifstream payfile;

float gross;

float net;

float hours;

float payRate;

float stateTax;

float fedTax;

cout << fixed << setprecision(2) << showpoint;

// Fill in the code to open payfile and attach it to the physical file

// named payroll.dat

payfile.open("payroll.dat");

// Fill in code to write a conditional statement to check if payfile

// does not exist.

if(!payfile)

{

cout << "Error opening file. \n";

cout << "It may not exist where indicated" << endl;

return 1;

}

ofstream outfile("pay.out");

cout << "Payrate Hours Gross Pay Net Pay"

<< endl << endl;

outfile << "Payrate Hours Gross Pay Net Pay"

<< endl << endl;

// Fill in code to prime the read for the payfile file.

payfile >> hours;

// Fill in code to write a loop condition to run while payfile has more

// data to process.

while(!payfile.eof())

{

payfile >> payRate >> stateTax >> fedTax;

gross = payRate * hours;

net = gross - (gross * stateTax) - (gross * fedTax);

cout << payRate << setw(15) << hours << setw(12) << gross

<< setw(12) << net << endl;

outfile << payRate << setw(15) << hours << setw(12) << gross

<< setw(12) << net << endl;

payfile >> hours ;// Fill in the code to finish this with the appropriate

// variable to be input

}

payfile.close();

outfile.close();

return 0;

}

4 0
3 years ago
What is a lan adapter
ryzh [129]

Answer:

A LAN adapter is an expansion board that is used to connect a computer or computing device to a network. LAN adapter is the most common and generic alternate name for a Network Interface Card (NIC).

4 0
3 years ago
Read 2 more answers
3. Which property is used to select full Row of data grid view
Tju [1.3M]

Answer:

I think a is correct answer.

4 0
3 years ago
If there is no computer how would human beings have performed the workk
Katena32 [7]

I’m pretty sure we would do things at the agency would do it because overall th i’m pretty sure we would do things at the agency would do it because overall the agents were actually much smarter than we are literally right now and someways because they use more organic and natural and a whole things like herbs Escentuals would help you more than the chemicals in the flu shots that we take and have chemicals and are bad for the body

3 0
3 years ago
The program below reads in the number of minutes entered by a user. The program that converts the number of minutes to hours and
Pavlova-9 [17]

Answer:

Written in Python:

hours = int(input("Hours: "))

mins = int(input("Minutes: "))

result = hours * 60 + mins

print("Result: "+str(result)+" minutes")

Explanation:

This line prompts user for hours

hours = int(input("Hours: "))

This line prompts user for minutes

mins = int(input("Minutes: "))

This line calculates the required output

result = hours * 60 + mins

This line prints the required output in minutes

print("Result: "+str(result)+" minutes")

4 0
3 years ago
Other questions:
  • Suppose you have a certain amount of money in a savings account that earns compound monthly interest, and you want to calculate
    10·2 answers
  • Which of the following does every font that you choose communicate, either on a conscious or subconscious level?
    10·2 answers
  • Impanation stage contain ​
    10·1 answer
  • Design and implement a class dayType that implements the day of the week in a program. The class dayType should store the day, s
    11·1 answer
  • ___________ is a technique that uses IT to develop an ongoing relationship with the purchasers or buyers of an organization's pr
    13·1 answer
  • when two people are in a race, what do you need to know to determine who is the fastest 1 units of speed that are identical 2 th
    10·1 answer
  • 40 points
    5·2 answers
  • true Or False 1. Computer Time is located in Start Menu, b. Ms Word is developed by Adobe Corporation c. Ms-Excel is Presentatio
    9·1 answer
  • An online bank wants you to create a program that shows prospective
    12·1 answer
  • What changes could you make so that a message, "User input deemed invalid." during designing a simple calculator program for you
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!