Friday

September 4, 2015
Number of results: 427

**statistics**

Factories A, B and C produce computers. Factory A produces 3 times as many computers as factory C, and factory B produces 6 times as many computers as factory C. The probability that a computer produced by factory A is defective is 0.02, the probability that a computer ...
*February 22, 2015 by cindy*

**probability**

a disk drive is randomly selected from 50 available disk drives, of which five are defective. What is the probability that it is not defective?, hope you answer this, thanks! :)
*September 21, 2012 by nitz*

**Algebra1**

A CELL PHONE ORDDERS 500 NEW PHONES FROM A MANFACTURE.IF THE PROBABLITY OF A PHONE BEING DEFECTIVE IS 2.6% PREDICT HOW MANY OF THE PHONES ARE LIKELY TO BE DEFECTIVE.ROUND TO THE NEAREST WHOLE NUMBER
*December 5, 2011 by devin*

**EEE**

the solve of the shipment of 10 items has 2 items defective and 8 items are non defective.IN THE inspection of the shipment a sample of items will be selected and tested.if a defective items is found the shipment of 10 items will rejected.in a sample of 5 items what is the ...
*October 15, 2011 by ibrahim*

**Math Finite**

A box contains 15 pens of which 4 are defective. A random sample of 3 pens is taken without replacement and without regard to order. What is the probability of selecting at least one defective pen?
*December 9, 2010 by Amy*

**statistics**

5. Suppose a manufacturer of computer chips is experiencing an average of 2% defective chips. (a) If a lot contains 1000 chips, what is the probability that more than 25 chips are defective? HINT. Use the normal approximation to the binomial.
*March 23, 2014 by Marisol*

**Math**

In a shipment of 400 parts 14 are found to be defective how many defective parts should be expected in a shipment of 1000? 125
*October 16, 2013 by Jerald*

**algebra.. PLEASE help me!!**

A company manufactured 1,000 televisions. Testing showed that 20 of the televisions were defective. PART A: What is the experimental probability that the next television will be defective? PART B: Based on the probability in PART A, how many of the next 5,000 televisions ...
*April 11, 2013 by Alexandrea*

**science**

Two machines A and B produce respectively 60% and 40% of the total number of items of a factory. The percentages of defective output for A and B are 3% and 2% respectively. Suppose an item is selected at random, and is found to be defective. The probability that the item was ...
*July 23, 2012 by chinthaka*

**Statistics**

There are 6 batteries. Two are defective. If you pull out two batteries, what is the probability that neither are defective? Is this how you solve it? 4/6 X 3/5
*June 20, 2011 by Todd*

**Probabilities**

Need some help please! A box contains four good light bulbs and three defective ones. Bulbs are selected one at a time (without replacement). Find the probability that the second defective bulb is found on the third selection.
*June 10, 2015 by Bianca T*

**Math**

A manufacturer samples 100 wires for quality testing. Four of the wires are found to be defective. If 750 wires are produced in one hour, how many should the manufacturer expect to be defective? A.30 B.60 C.75 D.96
*April 29, 2014 by Candy*

**math**

in a shipment of 20 computers, 3 are defective three computers are randomly selected and tested. what is the probability that all 3 are defective if the first and second ones are not replaced after being tested. a. 1/760 b.1/1140 c.27/8000 d.3/5000 i chose D, is this correct
*May 17, 2010 by Sara!*

**statistics**

at the tire store, 10 out of every 100 tires are defective. if your parents randomly choose and purchase 4 new tires for a family vehicle from a set of 100 newly shipped titres, what is the probability that all four will be defective
*November 12, 2014 by karen*

**Probability**

An assembly line has two inspectors. The probability that the first inspector will miss a defective item is 0.05. If the defective item passes the first inspector, the probability that the second inspector will miss it is 0.01. What is the probability of the event that a ...
*November 11, 2014 by KG*

**statistics**

In a box of thirty AAA batteries, there are three defective batteries. Two batteries are randomly selected and tested. What is the probability that both are defective, if the first one is not replaced after being tested?
*September 19, 2010 by Lori*

**Math**

Three out of 200 machine parts were found to be defective. About how many parts would be expected to be defective out of 2500 parts?
*January 24, 2014 by James*

**Math**

Three out of 200 machine parts were found to be defective. About how many parts would be expected to be defective out of 2500 parts?
*January 24, 2014 by James*

**math**

Three out of 200 machine parts were found to be defective. About how many parts would be expected to be defective out of 2500 parts?
*February 3, 2014 by Na Bug*

**math**

Three out of 200 machine parts were found to be defective. About how many parts would be expected to be defective out of 2500 parts?
*May 14, 2014 by sam*

**Math**

An electronic store receives a shipment of 30 graphing calculators, including 6 that are defective. Four of these calculators are selected to be sent to a local high school. How many selections can be made? How many of this selections will contain two defective calculators?
*February 20, 2012 by Oshurbekova*

**math**

Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to find the probability that four or more car ...
*February 11, 2012 by k*

**statistics**

In a batch of 97 computer diskettes, 8 are defective. A sample of six diskettes is to be selected from the batch.How many of the samples consist of all defective diskettes?
*February 20, 2011 by hanna*

**Math**

Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to find the probability that four or more car ...
*February 11, 2012 by Krista*

**Statistics**

Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to find the probability that four or more car ...
*February 11, 2012 by Krista*

**Math**

My question is to get a better understanding of this. Basically, these two problems, I did it WITHOUT replacement. So I would multiply each defects and so forth. My question is, would I have to subtract the total from 1 in the second question? I am not exactly clear on when to...
*March 6, 2007 by J*

**PROBABILTY-STATS HELP**

A product is assembled from 3 components X,Y,Z and the probability of these components being defective is 0.01, 0.02,0.05. i have to find the probability that the assumed product will not be defective? can someone explain to me, how do it? thanks
*April 5, 2012 by Taskeen*

**quantitative techniques**

a manufacturer of a cotter pins know that 5% of his product is defective if he sells cotter pins in boxes of 100 pins and guarantee that no more than 10 pins will be defective find the probability that a box will fail to meet the guaranteed quality
*April 14, 2015 by saloni garg*

**Statistics/Binomal**

I really need help I do not understand how to start this problem. A machine that manufactures automobile parts produces defective parts 15% of the time. If 7 parts produced by this machine are randomly selected, what is the probability that at least 3 of the parts are ...
*August 14, 2015 by Mary Ann *

**Stat**

Two percent of the circuit boards manufactured by a particular company are defective. If circuit boards are randomly selected for testing, the probability it takes 10 circuit boards to be inspected before a defective board is found is
*January 3, 2010 by Max*

**probability**

six out of every 400 cans of paint are found to be defective. If you buy four cans of paint,what is the probability that one can will be defective.
*March 5, 2013 by sarah*

**math**

Julio works as a quality control expert in a beverage factory. The assembly line that he monitors produces about 20,000 bottles in a 24-hour period. Julio samples about 120 bottles an hour and rejects the line ifhe finds more than 1/50 of the sample to be defective. About how ...
*December 13, 2006 by tara*

**statistics**

Two percent of the circuit boards manufactured by a particular company are defective. If circuit boards are randomly selected for testing, the probability that the number of circuit boards inspected before a defective board is found is greater than 10 is
*March 29, 2010 by Hanna*

**statistics**

Two percent of the circuit boards manufactured by a particular company are defective. If circuit boards are randomly selected for testing, the probability that the number of circuit boards inspected before a defective board is found is greater than 10 is
*March 29, 2010 by Hanna*

**Algebra 1**

A community group orders 1,250 water bottles to donate to the runners in a marathon. If the probability of a water bottle being defective is 1.2%, predict how many of the water bottles are likely to be defective. Round your answer to the nearest whole number. a. 12 b. 15 c. ...
*May 20, 2014 by Nyla*

**statistics**

A company has four production sections viz., S1, S2, S3 and S4 which contribute 30%, 20%, 28% and 22% of the total output. It was observed that those sections respectively produced 1%, 2%, 3% and 4% defective units. If a unit is selected at random and found to be defective, ...
*February 4, 2015 by Harry*

**probability**

The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 15 calculators are selected at random, what is the probability that 4 or more of the calculators will be defective
*July 22, 2012 by Anonymous*

**statistics**

4.90. Defective Equipment. A piece of electronic eqipment contains six computer chips, two of which are defective. Three chips are selected at random, removed from the piece of equipment, and inspected. Let x equal the number of defectives observed, where x = 0, 1, or 2. Find ...
*October 17, 2010 by Anonymous*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*March 27, 2012 by Chris*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*March 27, 2012 by Chris*

**probability**

In a shipment of 11 CD players, two are defective. Find the probability that a sample of 3 CD players will contain no more than one defective one.
*June 18, 2011 by vanessa*

**statistics**

Three percent of the widgets produced by machine 1121 are defective. what is the probablity that a box of 30 widgets produced by that machine contains two or more defective widgets?
*December 10, 2011 by John*

**maths**

a box contains 20 fuses ,out of which ,5 are defective.if a sample of 3 fuses is chosen from the box at random without replacement,find the probability that x fuses in this sample will be defective
*February 11, 2012 by ashely*

**inferential statistics**

A supplier of company X makes on an average of 5 defective pieces. The company accepts a sample if there are no more than 7 defective pieces. What are the chances that the company will reject the sample?
*August 19, 2014 by shailja*

**Probability**

A company produces light bulbs, and finds that approximately 2% of the light bulbs they produce are defective. The company wants to make a money-back guarantee that in every box of 10 light bulbs, no more than 1 will be defective. What is the probability that a random box of ...
*April 28, 2015 by Peanut*

**statistics**

Given the following situation, how would you use Megastat to test whether the population defective rate is greater than 10%? Please outline the process for the test and, if necessary, including the output from Megastat to explain your approach. What conditions do you need to ...
*January 29, 2010 by Jenny*

**Ap Statistics**

Two percent of the circuit boards manufactured by a particular company are defective. If circuit boards are randomly selected for testing, the probability that the number of circuit boards inspected until a defective board is found is greater than 10 is (a)1.024 X 10^7 (b) 5....
*February 16, 2009 by Nishi*

**statistics**

1. The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Suppse the batch contains 2% defective syringes. Find sigma. Please show work. Thanks
*June 25, 2011 by Harley*

**statistics**

Unknown to a quality-control inspector, 20% of a very large shipment of electric switches are defective. The inspector has been told to reject the shipment if, in a sample of 15 switches, 2 or more are defective. The probability that the shipment will be rejected is: I do not ...
*July 7, 2015 by helpmeplease*

**math**

3 out of every 1,000 bulbs produced are defective. If 5,000 bulbs are produced, how many would you expect to be defective
*July 11, 2013 by Anonymous*

**statistics**

the quality control inspector of a production plant will reject a batch of syringes it two or more defective syringes are found in a random sample of ten syringes taken from the batch. suppose the batch contains 2% defective syringes. What is the probability that the batch ...
*September 12, 2010 by sandra*

**statistics**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 170 and a variance of 4. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*August 25, 2011 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 4. The material is considered defective if the breaking strength is less than 161 pounds. What is the probability that a single, randomly selected piece ...
*March 9, 2012 by Anonymous*

**law of torts**

If a manufacturer made 100,000 hair dryers and only one was defective, he could: a) Still be liable for the one defective hair dryer. b) Ask the court for punitive damages. c) Ask the court for exemplary damages. d) b and c. e) None of the above. I would think a?
*April 3, 2012 by shelly*

**MATH**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*June 3, 2012 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 172 and a variance of 4. The material is considered defective if the breaking strength is less than 168 pounds. What is the probability that a single, randomly selected piece ...
*August 27, 2012 by dawn*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 173 and a variance of 9. The material is considered defective if the breaking strength is less than 167 pounds. What is the probability that a single, randomly selected piece ...
*December 21, 2012 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 145 and a variance of 25. The material is considered defective if the breaking strength is less than 134.5 pounds. What is the probability that a single, randomly selected ...
*March 17, 2013 by buffy*

**Algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 195 and a variance of 4. The material is considered defective if the breaking strength is less than 190.2 pounds. What is the probability that a single, randomly selected piece...
*March 6, 2014 by Walden University*

**statistics**

the breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113 pounds. What is the probability that a single, randomly selected piece ...
*June 3, 2014 by Anonymous*

**statistics**

the breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113 pounds. What is the probability that a single, randomly selected piece ...
*June 3, 2014 by leelee kay *

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 9. The material is considered defective if the breaking strength is less than 157.8 pounds. What is the probability that a single, randomly selected piece...
*December 9, 2014 by libby*

**Math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113.5 pounds. What is the probability that a single, randomly selected ...
*March 1, 2015 by Denise*

**math **

One light bulb is selected at random from a lot of 150 light bulbs, of which 6% are defective. What is the probability that the light bulb selected is defective?
*February 20, 2011 by Vanny*

**standard deviations**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*December 4, 2011 by Anonymous*

**Statistics/I am confused**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 115 and a variance of 25. The material is considered defective if the breaking strength is less than 105 pounds. What is the probability that a single, randomly selected piece ...
*May 31, 2014 by Mary Ann *

**Quantitative analysis**

3. A service station owner sells Firm-on-the-road tyres which are ordered from a local tyre distributor. The distributor receives tyres from two plants, A and B. When the owner of the service station receives an order from the distributor, there is a 0.5 probability that the ...
*February 6, 2011 by george*

**Statistics**

In a sample of 77 widgets, 6 were defective. How many defective widgets would you expect in a sample of 616 widgets?
*April 30, 2013 by Lenore*

**math**

In a sample of 77 widgets,6 were defective, How many defective widgets would you expect in a sample of 616 widgets?
*May 1, 2013 by pandora*

**Math**

In a sample of 78 widgets, 2 were defective. How many defective widgets would you expect in a sample of 468 widgets?
*June 12, 2014 by John*

**Statistics**

Can someone please help me with this example, I do not understand it at all. Binomial problems: Advanced A machine that manufactures automobile parts is estimated to produce defective parts % of the time. If this estimate is correct, and parts produced by this machine are ...
*May 26, 2010 by Christi*

**Finite Math**

A factory produces fuses, which are packaged in boxes of 26. Eight fuses are selected at random from each box for inspection. The box is rejected if at least one of these eight fuses is defective. What is the probability that a box containing twelve defective fuses will be ...
*March 15, 2012 by Amanda*

**Binomial Math**

The manager of Toy World has decided to accept a shipment of electronic games if there is no more than 1 defective electronic game in a random sample of size 17. What is the probability that he will accept the shipment if 15% of the electronic games is defective? (Round your ...
*January 27, 2013 by Bersy*

**Math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 170 and a variance of 4. The material is considered defective if the breaking strength is less than 164 pounds. What is the probability that a single, randomly selected piece ...
*August 24, 2011 by Lee Ann*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 4. The material is considered defective if the breaking strength is less than 161 pounds. What is the probability that a single, randomly selected piece ...
*August 24, 2011 by apryl*

**algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 166 and a variance of 4. The material is considered defective if the breaking strength is less than 160 pounds. What is the probability that a single, randomly selected piece ...
*August 27, 2011 by Anna Swain*

**alegbra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 167 and a variance of 9. The material is considered defective if the breaking strength is less than 161 pounds. What is the probability that a single, randomly selected piece ...
*August 28, 2011 by apryl*

**algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 172 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*September 1, 2011 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 172 and a variance of 9. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single, randomly selected piece ...
*November 1, 2011 by Kristen*

**MATH**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 174 and a variance of 9. The material is considered defective if the breaking strength is less than 168 pounds. What is the probability that a single, randomly selected piece ...
*December 11, 2011 by mONIQUE*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 4. The material is considered defective if the breaking strength is less than 169 pounds. What is the probability that a single, randomly selected piece ...
*March 14, 2012 by ruth*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 173 and a variance of 9. The material is considered defective if the breaking strength is less than 164 pounds. What is the probability that a single, randomly selected piece ...
*August 29, 2012 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 167 and a variance of 9. The material is considered defective if the breaking strength is less than 158 pounds. What is the probability that a single, randomly selected piece ...
*September 11, 2012 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*December 2, 2012 by jacque*

**Algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 172 and a variance of 9. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single, randomly selected piece ...
*December 3, 2012 by Angela*

**Algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 167 and a variance of 4. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single, randomly selected piece ...
*December 4, 2012 by Lost!!*

**algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 9. The material is considered defective if the breaking strength is less than 156 pounds. What is the probability that a single, randomly selected piece ...
*December 6, 2012 by Anonymous*

**statistics**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 9. The material is considered defective if the breaking strength is less than 156 pounds. What is the probability that a single, randomly selected piece ...
*December 6, 2012 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed with a mean of 175 and a variance of 4. The material is considered defective if the breaking strength is less than 170 pounds. What is the probability that a single, randomly selected piece of...
*March 10, 2013 by Andrew*

**algebra/math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 169 and a variance of 9. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single, randomly selected piece ...
*August 28, 2011 by Anonymous*

**math **

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113 pounds. What is the probability that a single, randomly selected piece ...
*June 3, 2014 by leelee kay *

**Math 105**

To estimate the proportion p of defective light bulbs produced in a factory, a sample of 180 bulbs were tested. In this sample 27 were defective. We will compute a 95 percent confidence interval for p. Compute the margin of error e in esimating p at 95 percent level of ...
*July 25, 2014 by Anonymous*

**maths-statistic**

A manufacturer wants to assess the proportion of defective items in a large batch produce by a particular machine. He tests a random sample of 300 items and finds that 45 items are defective. If 200 such tests are performed and a 95% confidence interval calculated for each, ...
*February 15, 2011 by shasha*

**math**

An efficiency expert has calculated that about 9.5% of the articles produced in a manufacturing plant are defective. This is equivalent to expressing the defective articles as a. 9 out of 15 b. 9 out of 50 c. 10 out of 95 d. 19 out of 100 e. 19 out of 200 please answer and ...
*April 9, 2014 by thomas*

**Statistics**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 167 and a variance of 9. The material is considered defective if the breaking strength is less than 158 pounds. What is the probability that a single, randomly selected piece ...
*September 13, 2012 by Anonymous*

**Math Probability**

A new shipment of 9 VCRs, which will be offered at a very low price, are delivered, Unknown to the manager, 4 of the VCRs are defective, Determine the probability that at least 1 of the first three VCRs sold is defective.Did I do this right? 1-5C3/9C3 =88.09% or do I do 1-(5/9...
*April 25, 2010 by Rae*

**Math**

In one hour, a factory packaged 150 boxes of light bulbs. Estimate the total number of defective light bulbs packaged that hour based on a sample of 8 boxes containing the following numbers of defective bulbs: 5, 3, 5, 1, 2, 9, 4, 3
*February 3, 2014 by Lola*

**Math**

A factory produces fuses, which are packaged in boxes of 16. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of the three fuses is defective. What is the probability that a box containing six defective fuses will be rejected?
*July 10, 2014 by Miranda*

**algebra 1**

From a shipment of 350 light-bulbs, a sample of 70 was selected at random and tested. If 21 light-bulbs in the sample were found to be defective, how many defective light-bulbs would be expected in the entire shipment?
*September 18, 2011 by alex*

**statistics**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 135 and a variance of 16. The material is considered defective if the breaking strength is less than 126.2 pounds. What is the probability that a single, randomly selected ...
*December 16, 2013 by Anonymous*