FREE Trial

A laundrette has 3 washing machines which are in constant use. The time until failure for a working machine...

No answer yet for this question. Ask a Tutor

Question:

Transcribed Image Text:

A laundrette has 3 washing machines which are in constant use. The time until failure for a working machine has an exponential distribution with the expected value of 100 hours. There are two mechanics who repair failed machines. A defective machine is repaired by only one mechanic. All repair times have exponential distribution with expected value 4 hours. Times between failures and repair times are independent. Consider the steady state. (a) What is the average percentage of operating machines? (b) What is the average percentage of idle mechanics?

Expert Answer:

Answer rating: 100% (QA)

answer-question
Related Book For  answer-question
Statistical Techniques in Business and Economics

Statistical Techniques in Business and Economics

ISBN: 9781260239478

18th Edition

Authors: Douglas Lind, William Marchal, Samuel Wathen

See More Books
View Solution
Create a free account to access the answer
Cannot find your solution?
Post a FREE question now and get an answer within minutes. * Average response time.
Posted Date: January 03, 2021 09:55:20
See More Questions

Students also viewed these mathematics questions

Q:
The lifetime of LCD TV sets follows an exponential distribution with a mean of 100,000 hours. Compute the probability a television set: a. Fails in less than 10,000 hours. b. Lasts more than 120,000...
A:
a P x 10 000 P X10 000 1 e 10 000 100 000 1 e 0 1 0 0952 The value retu......
Q:
19. Checkout times in a Walmart store follow an exponential distribution with a mean time of 8 minutes. What is the probability that the checkout time for the next customer will be 6 minutes or less?...
A:
Exponential distri......
Q:
Given another investment with an expected value of 12 percent and a standard deviation of 2.2 percent that is countercyclical to the investment in problem 2, what is the expected value of the...
A:
Expected Value K i P i K i......
Q:
An inductor has a linear change in current from 50 mA to 100 mA in 2 ms and induces a voltage of 160 mV. Calculate the value of the inductor.
A:
v L di dt......
Q:
Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25C with a low velocity and exits at 1 MPa and 347C with a velocity of 90 m/s. The compressor is cooled at a rate...
A:
Air is compressed by a compressor The mass flow rate of air through the compressor is to be de......
Q:
Assume you have all your wealth (a million dollars) invested in the Vanguard 500 index fund, and that you expect to earn an annual return of 12%, with a standard deviation in returns of 25%. Since...
A:
The expected return on the new portfolio 0 2 5......
Q:
The energy balance can be developed for just about any process. Since our goal is to learn how to develop model equations as well as to simply apply them, it is valuable practice to obtain the...
A:
The energy balance for a gas home furnace can be expressed as follows Energy Input Energy Output Ene......
Q:
On 1 July 2005 Neil Chen purchased a block of land (1004m2 ) with a 3 bed-room house on it for $700,000. The house was rented out immediately since 1 July 2005 till June 2017. As the relevant...
A:
solution 1 what are the cgt consequences of the subdivision particulars amount assessment outline 10......
Q:
Hatfield Manufactuers, a registered VAT vendor, bought machinery for R586 500 (including VAT) on 1 October 2021. Machinery is depreciated at 15% per year according to the reducing balance method. The...
A:
Cost Price R586 500 Calculation for the year ending 30 April 20......
Q:
Wednesday Addams is a graduating senior who is going to take her final exams next week. She divides her available weekend study time into 10 periods of equal length. She is taking four courses, two...
A:
To formulate the decision problem as an integer programming model we can define the following variab......
Q:
The Law of Mass Action tells us that the time, T, taken by achemical to create a quantity xo of the product (inmolecules) is given by kdx T = * (a- xMb - x) where a and b are initial quantities of...
A:
a We want to evaluate the integral k dz a x b x T Using partial fractions we have C a x b 2 a I k C......
Q:
Many universities across the world have committed to becoming carbon neutral within the next few decades. This is encouraging many efforts to reduce waste such as the "My Cup" program, where the...
A:
Carbon footprint of a conventional paper cup per use 1 5011 kg CO2eq Carbon footprint of a reusable......
Q:
Determine the horizontal and vertical components of reaction at the pins A, B, and C. 3 m A C -2m- 3 kN/m Prob. F2-1 -2 m B
A:
The horizontal and vertical components of reaction at the pins A B and C of the frame shown in the i......
Q:
Match the term to its definition. Body language a. Stage of grief that allows the person an attempt to resolve the pets problem by any means possible b. What is considered acceptable by people in...
A:
Here is the matching of the terms and their definitions Term Definition Body language The use of man......
Q:
Match the term to its definition. Sender a. Stage of grief that allows the person an attempt to resolve the pets problem by any means possible b. What is considered acceptable by people in regards to...
A:
Sender c Person trying to relay an idea or message in the ro......
Q:
Match the term to the definition. Hardware a. Box-like equipment that allows access to the Internet b. Equipment used to make exact copies of paper or other documents c. Movable instrument attached...
A:
Hardware o The physical parts of the computer and its equipment Hardware refers to the physica......
Q:
How do organizations assess and manage the impact of environmental, social, and governance (ESG) risks and opportunities on their financial statements, and what are some best practices for...
A:
The detailed answer for the above question is provided below Environmental social and governance ESG......
Q:
Identify Thank You mission, strategy and core competencies. Identify strategy changes that have taken place at Thank You since its founding in 2008. Your answer must in text references and must be...
A:
Click to View...
Q:
An investment will be worth $1,000, $2,000, or $5,000 at the end of the year. The probabilities of these values are .25, .60, and .15, respectively. Determine the mean and variance of the investments...
A:
The mean of the investments dollar value is xP x 1 000 x 0 25......
Q:
Using the period 201012 as the base period, compute a simple index of the number of employees for each year from 2013 to 2018. Johnson & Johnson Domestic Sales International Sales ($ illion) ($...
A:
Compared to 2010 2012 average the number of employees is 12 7 higher Year 2010 2011 2012 20......
Q:
Compute Laspeyres price index for 2018 using 2010 as the base period. Price Quantity Part 2010 2018 2010 2018 RC-33 $0.50 $0.60 320 340 SM-14 1.20 0.90 110 130 WC50 0.85 1.00 230 250
A:
P 0 60 320 0......
Financial Accounting A Critical Approach 1st Edition - ISBN: 0130193720 - Free Book