Tuesday

February 21, 2017
Number of results: 511

**Probability Math**

Through a mix up on the production line, 5 defective light bulbs were shipped out with 32 good ones. If 4 are selected at random, what is the probability that at least 3 of them are defective?

*May 2, 2012 by Jack*

**statistics**

Container 1 has 8 items, 3 of which are defective. Container 2 has 5 items, 2 of which are defective. If one item is drawn independently from each container: Find the probability distribution for X defined as the number of defective items drawn(Hint: You have to use both ...

*November 8, 2010 by Marla*

**finite math**

a quality control engineer at a light bulb plant estimated that 1% of the bulbs it sells are defective. if you purcgase a package of 3 bulbs what is the probability that exactly one of them is defective?

*March 24, 2011 by ophelia*

**finite math**

a quality control engineer at a light bulb plant estimated that 1% of the bulbs it sells are defective. if you purcgase a package of 3 bulbs what is the probability that exactly one of them is defective?

*March 24, 2011 by ophelia*

**Statistics**

Half of a set of the parts are manufactured by machine A and half by machine B. Four (.04) of all the parts are defective. Six percent (6%) of the parts manufacture on machine A are defective. Find the probability that a part was manufactured on machine A, given the part is ...

*July 16, 2010 by nounou*

**PROBABILITIES**

Factories A and B produce computers. Factory A produces 3 times as many computers as factory B. The probability that an item produced by factory A is defective is 0.037 and the probability that an item produced by factory B is defective is 0.05. A computer is selected at ...

*December 2, 2010 by cmb*

**math**

A manufacturer of calculators would like to separate defective calculators from calculators that are acceptable. Through an error, a shipment of twelve calculators is sent out containing three defective calculators and nine working calculators. A customer buys five of these ...

*October 28, 2016 by Anonymous*

**math**

A manufacturer of calculators would like to separate defective calculators from calculators that are acceptable. Through an error, a shipment of twelve calculators is sent out containing three defective calculators and nine working calculators. A customer buys five of these ...

*October 29, 2016 by Anonymous*

**statistics 221**

A shipment of 35 computers contains three that are defective. How many ways can a small business buy four of these computers and receive no defective ones. a. 128 b. 35960 c. 52360 d. 6545

*October 21, 2010 by Anonymous*

**Statistics**

A shipment of portable radios contains 14 good radios and 3 defective ones. If two are randomly selected (without replacement) and tested, find the probability that at least one will be defective.

*December 10, 2011 by Katie*

**Statistics**

A shipment of portable radios contains 14 good radios and 3 defective ones. If two are randomly selected (without replacement) and tested, find the probability that at least one will be defective.

*December 10, 2011 by Katie*

**Data Management**

In a manufacturing process, it is estimated that only 2% of the bolts that are machined are declared defective, that is, they are either too large or too small. In a package of 50 bolts, what is the probability that there is at least one defective bolt?

*January 21, 2014 by Alejandro*

**Intro to Probability**

Widgets are produced at a certain factory by each of three machines A, B and C. These machines produce 1000, 600 and 400 widgets per day, respectively. The probability that a given widget is defective is 4% for one produced by Machine A, 3% if produced by Machine B, and 2% if ...

*February 17, 2008 by Amelie*

**Please can help me solving my problems(Probality)**

A manufacturer makes mobile phone. The manufacturer employs are inspector to check the quality of its product. The inspector tested a random sample of the phone being defective as 0.049. Ashmita buys three of the phones made by the manufacturer. Find the probability that. 1) ...

*April 12, 2012 by Fakaapo. Suetusi*

**Statistics**

A Manufacturer of torque converters claim only 1% of them are defective. A. In a shipment of 12 torque converters calculate the probability exactly 2 converters are defective. B. In a shipment of 35 converters, calculate the probability at least 1 converter is defective.

*March 26, 2013 by Bill*

**Data Management**

Sorry...i wrote the previous questions wrong.. The producer of HB pencils has 720 pencils randomly chosen from each day's productions. A defect rate of 15% is acceptable. a) Assuming that 15% of all manufactured pencils are defective, what is the probability of finding at ...

*January 13, 2008 by Jamey*

**statistic**

a shipment of 40 television sets contains 3 defective units. How many ways can a vending company can buy five of these units and receive no defective units

*April 17, 2012 by desmond*

**math 221n**

A shipment of 40 television sets contains 3 defective units. How many ways can a vending company can buy five of these units and receive no defective units?

*August 27, 2014 by anu*

**math**

A manufacturer of light bulbs knows that 3% of the production of their 60W bulbs will be defective. What is the probability that exactly 5 bulbs in a carton of 144 will ne defective?

*January 26, 2011 by Jeff*

**Math**

during the warranty period, 6% of their computers are returned because they have defective keyboards, 5% are returned because they have defective disk drives, and 1% are returned because both the keyboard and the disk drive are defective. What is the probability that a ...

*July 27, 2013 by Sarah*

**Statistics**

A stationary store has decided to accept a large shipment of ball-point pens if an inspection of 20 randomly selected pens yields no more than two defective pens. a) find the probability that this shipment is accepted if 5% of the total shipment is defective. b) find the ...

*August 7, 2013 by Elayna*

**stastics**

If 1.5% of the bolts made by an automotive factory are defective, what is the probability that in a shipment of 200 bolts, there are 6 defective bolts? Place your answer, rounded to four decimal places, in the blank.

*July 8, 2012 by jen*

**math**

Suppose that 30% of a company's television sets are manufactured at a plant in Portland and 70% at a plant in Houston. Of those made in Portland, 3% are defective, and of those made in Houston 9% are defective. If you buy a defective set from the company, what is the ...

*March 22, 2011 by Anonymous*

**Statistics**

Find the probability that at most 5 defective bolts will be found in a box of 200 bolts if it is known that 2 per cent of such bolts are expected to be defective .(you may take the distribution to be Poisson; e-4= 0.0183).

*October 26, 2010 by Shams*

**math**

A manufacturer of light bulbs knows that 3% of the production of their 60W bulbs will be defective. What is the probability that exactly 5 bulbs in a carton of 144 will ne defective? Did not understand the posted answer before, need it simplified.

*January 26, 2011 by Jeff*

**Maths**

In a large lot of electric light bulbs,5% of the bulbs are defective.calculate the probability that a random sample of 20 will contain at most 2 defective bulbs? Try ;->Pr=nCx p^xq^n-x .pr(2D)=20C2(0.05)^2(0.95)^18;->=2.2/ANS

*June 5, 2014 by Destiny*

**OPRE**

A producer is very proud of the peaches he grows. He claims that, on average, 10% or less of his peaches in a bushel are defective. You take a sample of 400 peaches and find that 50 are defective. If Î± = 0.025, what will be the decision?

*November 29, 2016 by Anonymous*

**Math**

In a shipment of 1000 light bulbs 1/40 of the bulbds were defective. What is the ratiio of defective bulbs to nondefective bulbs?

*April 18, 2011 by ashely*

**Probability**

Factories A and B produce computers. Factory A produces 2 times as many computers as factory B. The probability that an item produced by factory A is defective is 0.012 and the probability that an item produced by factory B is defective is 0.04. A computer is selected at ...

*April 26, 2011 by Julie*

**math**

A manager of an electronics store takes a random sample of large shipments of circuit boards to determine if he will accept the delivery. he randomly samples 20 boards from a shipment and will reject the delivery if more than 1 circuit board is defective. if the manufacturer ...

*March 5, 2013 by jack*

**statistics**

In a random sample of 400 electrical components,100 are found to be defective.if the hypothesis is that 20% of the components are defective,what is the standard error of the sample proportion

*March 13, 2011 by sharon*

**math**

A shipment of 9 printers contains 4 that are defective. Find the probability that a sample of size 4, drawn from the 9, will not contain a defective printer . the probability is ?

*August 10, 2016 by sam*

**statistics**

A certain type of dvd player is sold at just two stores. 30% of sales are from store A and 70% of sales are from store B. 2.7% of the dvd players sold at store A are defective while 3.7% of the dvd players sold at store B are defective. If Kate receives one of these dvd ...

*March 16, 2015 by Amy*

**math**

In a shipment of 50 calculators,4 are defective. Two calculators are randomly selected and tested. What is the probability that both are defective if the first one is not replaced after being tested?

*May 13, 2014 by Miki*

**Math**

The panels for the Pulsar 32-inch TV are manufactured in three locations and then shipped to the main plant for final assembly. Plants A, B, and C supply 50%, 30%, and 20%, respectively of the panels.The quality-control department of the company has determined that 1% of the ...

*November 5, 2012 by Natalie*

**statistic and 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 20, 2012 by nitz*

**statistics and probability**

A company manufactures washers, about 5% of which are defective. If a random sample of 100 washers are inspected, what is the probability that fewer than 4 are defective?

*November 2, 2014 by ashley*

**STATISTICS**

The probability that a certain production process will produce a defective part is 0.20. If a box contains 12 parts, the probability that it will contain 6 defective parts is?

*March 21, 2016 by NARUTO*

**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*

**STATISTICS**

The probability that a certain production process will produce a defective part is 0.20. If a box contains 12 parts, the probability that there will be 6 or 7 defective parts is ??

*March 21, 2016 by NARUTO*

**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*

**statistics**

in a shipment of 7 items there are three defective items. at random 4 items are selected what is the expected number of defective items?

*January 15, 2016 by arun*

**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**

im a girl ok um 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? A. 15 B. 30 C. 38 D. 67

*February 25, 2016 by jj buenrostro*

**Math**

Tony works in a factory that produces 1,000 computers each day. When 50 computers were sampled, it was fount that 7 were defective. Estimate how many defective computers are made each day.

*May 18, 2016 by Sadie*

**Probability, Stats**

For every 1000 batteries produced by a manufacturer 15 are defective. What is the probability that 100 randomly chosen batteries will have exactly 2 defective batteries?

*January 29, 2017 by Andrew*

**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**

A manufacture of a cotter pins know that 5¨G of his product is defective if he sells cotter pins in boxes of 100 and guarantees that no more than to pins will be defective, what is the approximate probability that a box will fail to meet that guaranteed quality?

*August 4, 2016 by menaka*

**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**

Mary works in a factory that produces 1,000 telephones each day. When 30 telephones were sampled, it was found that 9 were defective. Estimate how many telephones are defective each day.

*November 25, 2015 by Anonymous*

**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 PROBABILITY**

The probability of a machine producing a defective product is .08. Find the probability that, in a run of 200 products, there are exactly 12 defective products

*September 17, 2015 by Emma*

**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*

**statistics help please :(**

A shipment of 50 parts contains 11 defective parts. Suppose 3 parts are selected at random, without replacement, from the shipment. What is the probability that exactly 2 parts are not defective?

*December 14, 2015 by Izabella*

**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*

**statistics**

A shipment of 50 parts contains 12 defective parts. Suppose 3 parts are selected at random, without replacement, from the shipment. What is the probability that all 3 parts are defective?

*December 13, 2015 by blah*

**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*

**math**

A factory finds out that on the average 20% of bolts produced by the given machine will be defective.if 10 bolts are selected at random from the day's production of this machine,find the probability that 1.exactly 2 will be defective. (this question is base on probability and ...

*March 26, 2016 by farahan*

**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*

**Math**

In a shipment of 400 parts, 15 were found to be defective. How many defective parts should be expected in a shipment of 1000 parts?

*December 10, 2015 by Megan*

**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*