Wednesday

July 30, 2014

July 30, 2014

Number of results: 11,451

**stats **

Suppose that 20% of Canadians smoke. In a random sample of 20 Canadians, find the probability that more than 1 smokes
*November 10, 2013 by alf*

**statistics**

60% of math major are women 15 were random and what probability that 5 are women.
*September 21, 2010 by landa givens*

**geometry**

A point P is picked at random on line AE. What is the probability that P is on line BE?
*May 10, 2011 by Anonymous*

**math check**

While writing an article on the high cost of college education, a reporter took a random sample of the cost of new textbooks for a semester. The random variable x is the cost of one book. Her sample data can be summarized by the following. (Give your answers correct to two ...
*June 21, 2013 by tom9*

**Probabilities**

1.) two marbles are drawn without replacement from a bowl containing seven red, four blue, and nine yellow marbles. what is the probability that at least one is red? 2.)a card is drawn from a standard deck of 52 cards. what is the probability that the card is neither a four or...
*November 9, 2010 by J*

**Probabilities**

1.) two marbles are drawn without replacement from a bowl containing seven red, four blue, and nine yellow marbles. what is the probability that at least one is red? 2.)a card is drawn from a standard deck of 52 cards. what is the probability that the card is neither a four or...
*November 9, 2010 by J*

**stat probability**

An apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor 7 3 4 2nd floor 9 0 11 3rd floor 8 4 7 If an apartment is selected at random, what is the probability that it is a 2 bedroom apartment on the 3rd floor?
*April 8, 2013 by Lynn*

**math**

a set of 20 cards is numbered 1,2,3,... ..20. Suppose you pick a card at random without looking. Find the probability of each event. Write as a fraction in simplest form. P(3 or 13)
*March 25, 2008 by Jordan*

**MATH Prob.**

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers.
*August 8, 2009 by Twg*

**Math**

Find the probability of the following if there are 30 students in the class who have been numbered and you use a calculator to generate random numbers between 1 and 30. A number less than 10.
*June 28, 2011 by Mike*

**math**

Three points are chosen uniformly at random from the perimeter of circle. The probability that the triangle formed by these is acute can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?
*June 3, 2013 by anonymous*

**geometry**

Three points are chosen uniformly at random from the perimeter of circle. The probability that the triangle formed by these is acute can be expressed as a/b where a and b are co prime positive integers. What is the value of a+b?
*March 20, 2014 by gorav*

**math-please help!**

Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?
*April 25, 2010 by KiKi*

**Math- Statistics**

A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10. * a. This sample of 36 has a mean value of , which belongs to a sampling distribution. Find the shape of this sampling distribution. * b. Find the ...
*February 8, 2011 by Tammy*

**MATH**

D. Sam and Pete have a job dog-sitting for their neighbor. He pays them $5.00 for each hour they “sit”. Independent_______________________________ Dependent________________________________ I know the answer to independent I just need help with Dependent The independent ...
*January 3, 2007 by Austin*

**Science**

To determine the boing point of a liquid, a student heats 10 mL of the liquid in a test tube and records the temperature every minute for 20 minutes. In this example, time is the what? The choices are: Independent variable dependent variable hypothesis control Is it dependent ...
*May 22, 2013 by Jane*

**Statistics**

Let X1;X2;X3;...;X6 be a random sample from a distribution with the following probability desity function: Fx(x) = (1+4x)/3 for 0<x<1 = 0 for x=<0; x>=1. (a) Determine the joint p.d.f of Y1 and Y6 where Y1<Y2<...Y6 are the order statistics. (b) Let R= Y6-Y1 ...
*August 10, 2006 by ruth*

**statistics**

The marks obtained by 10 children in a metal drill are 0,1,3,3,5,7,8,9,9,9,.What is the probability that a child chosen at random scored 3 marks
*May 16, 2011 by Nii*

**Mathematics**

A card is selected at random from an ordinary pack of 52 playing cards.state the probability the card is a club.
*July 22, 2011 by Ray*

**math**

5 cards are drawn at random from a standard deck of playing cards. What is the probability that all are the same suit?
*May 14, 2012 by Derrick*

**maths**

A letter is picked at random from the English alphabet. Find the probability that the letter : a) Appears in the word GEOMETRY
*May 22, 2013 by arzam*

**math**

In a game played with 50 letter tiles, 21 of the tiles are vowels. If a tile is drawn at random, what is the probability that it is a consonant.
*December 5, 2013 by Katie*

**math**

80% of the American population likes pizza. If 8 Americans are chosen at random, find the probability that 6 of them like pizza.
*June 28, 2014 by jon*

**maths**

1. A die labelled A has one face marked 1, one face marked 2 and the other four faces marked 3. A die labelled B has four faces marked 2 and two faces marked 3. The dice A and B are thrown. Calculate the probability is 5. I got 18/36 2. There are 12 boys and 20 girls in a ...
*June 3, 2009 by Anonymous*

**Statistics**

A university has 1,000 computers available for students to use. Each computer has a 250-gigabyte hard drive. The university wants to estimate the space occupied on the hard drives. A random sample of 100 computers showed a mean of 115 gigabytes used with a standard deviation ...
*October 27, 2013 by Shelby*

**Math**

The number of accidents that occur at the intersection of Pine and Linden streets between 3 p.m and 6p.m on Friday afternoons is 0,1,2,or 3 with probabilities of 0.84, 0.13, 0.02 and 0.01, respectively. What is the expected value for the random variable given the number of ...
*August 14, 2009 by B.B*

**statistics**

Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with A random sample of 17 Australian bank stocks has a sample mean of For the entire Australian stock market, the mean dividend yield is Do these ...
*December 19, 2010 by kenya*

**Statistics**

4. Let X be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with A random sample of 19 Australian bank stocks has a sample mean of For the entire Australian stock market, the mean dividend yield is Do ...
*January 26, 2011 by Tab*

**Probability**

Im not sure how to start here. Please help. The age distribution of students at a community college is given below. Age (years) Under 21 21-25 26-30 31-35 Over 35 Number of students (f) 411 407 201 51 26 A student from the community college is selected at random. Find the ...
*October 28, 2006 by Mary*

**Probability**

Given additional information that 56% of the total employees in the company are male and 50% of them are employees who have been working less than 5 years. If an employee selected at random is known to have been working for 5 years or more, what is the probability that the ...
*October 20, 2009 by Joe*

**Math**

In an experiment, the probability of the event E is known to be .4. Also the probability of the event F is .8,and the probability of E∪F is 1. i) Compute the probability of these events: P(E∩F)= P(E-F)= ii) Suppose the experiment is run twice in succession. What ...
*April 21, 2011 by Tracy*

**Math**

A spinner has numbers 1-16 on it. Probability of 6? 1/16 Probability not 6 15/16 Probability even number 8/16 Probability multiple of 3 5/16? Probability not a multiple of 3 11/16?
*November 28, 2012 by Jerald*

**math**

In a classroom, the students are 12 boys and 6 girls. If one of the students is selected at random, find the probability that the student is a girl
*April 22, 2009 by yorkie16*

**algebra**

if one card is selected at random from a standard deck of 52 cards, what is the probability of choosing a black card or a king?
*May 23, 2010 by Jenny*

**statistics**

in a scientific study there are 8 pigs 5 of which are pregant if 3 are selected at random without replaement find the probability that all are pregant
*October 13, 2010 by joe*

**Stats**

The unemployment rate in a city is 9%. Find the probability that at least 2 out of 8 people from this city sampled at random are unemployed.
*October 28, 2010 by LiCee*

**business math**

3 cards are drawn simultaneously at random from a standard deck. Find the probability that all the cards are hearts.
*November 3, 2010 by cmb*

**Math**

What is the probability that at least 2 people in a random group of 4 people have a birthday on the same day of the week? Answer:
*April 27, 2011 by Meghan*

**math **

a bag contains 6 white 2 black and 10 green marbles if a marble is selected at random find the probability that it is green
*March 8, 2012 by Stephany*

**prealgebra**

you play a CD that has 11 songs using the random setting find the probability that the CD player plays songs 3 first and then song 5.
*April 11, 2012 by vivkvivkf*

**Estimation and Computation**

The ratio of boys to girls in a class is 2:3. If a student is chosen at random to be on the student council, what is the probability it will be a girl?
*March 28, 2013 by Taylor*

**statistics**

Consider a normal distribution with mean 20 and standard deviation 3. What is the probability a value selected at random from this distribution is greater than 20?
*May 12, 2013 by erin*

**Statistics**

If someone makes random guesses for each NCAA Basketball Tournament game, what is the probability of picking the winner in each game?
*September 17, 2013 by Mary*

**Math**

Coins numbered 1-200 are placed in a hat. What is the probability that a coin chosen at random out of the hat is a multiple of 6 or 9?
*January 22, 2014 by Kristen*

**Sociology**

the variable that sociologists exphasize the most as being the determining motivation for our thinking and behavior? A. Random chance events B. Natural born in instincts C. Inherited genetic structure D. ones society and social location My answer is D is that the right one. ...
*September 28, 2010 by tricica*

**Math**

A random variable Y has the following CDF ; Fy(y)= 0 x<-1 0.25 -1≤x<2 0.5 2≤x<3 1 x≥3 a)Find P[y\B] (Y) FOR B= y<3 b) Find E [y\B] c)Find Var [y\B]
*April 19, 2014 by Ozan*

**math 115**

Let x be a continuous random variable that follows a normal distribution with a mean of 200 and a standard deviation 25. Find the value of x so that the area under the normal curve between ě and x is approximately 0.4798 and the value of x is greater than ě.
*November 19, 2013 by louise*

**statistics**

Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with sigma =2.3%. A random sample of 17 Australian bank stocks has a sample mean of x bar 7.74%. For the entire Australian stock market, the mean ...
*July 24, 2010 by Clay*

**MATH/Probability**

our different written driving tests are administered by the MVD. one of these four tests is selected at random for each applicant for a drivers test. if a group consisting of two women and three men apply for a license, what is the probability that a. exactly two of the five ...
*February 23, 2009 by Shaniqua*

**probability**

A jar contains 3 red balls and 2 green balls. You draw one ball at random. Determine the probability of selecting a. red b. green c. blue d. red or green p.s: the reason I am asking this questions is because we never learned about it in class and I don't know how to do it; so ...
*March 17, 2011 by Evangelina*

**Science (2nd Try)**

To determine the boing point of a liquid, a student heats 10 mL of the liquid in a test tube and records the temperature every minute for 20 minutes. In this example, time is the what? The choices are: Independent variable dependent variable hypothesis control Is it dependent ...
*May 23, 2013 by Jane*

**Probability**

4.3. In a certain college town, 27.5 percent of the students failed Mathematics (Math), 19.8 percent failed Biology (Bio), and 11 percent failed both Math and Bio. A student is selected at random. Let A represent the event of failing Math, so that A' is the probability of ...
*September 2, 2012 by Carla Lopez*

**Statistic**

1. For this assessment, explicityly state the five steps of a simulation and carry out the simulation. Use the random digit table. A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of the game and missed 3 ...
*January 30, 2014 by Helen*

**Math **

Your teacher has a large box containing an equal number of red and blue folders. There are 24 students in your class. The teacher passes out folders at random. Ten students recieve a red folder. Compare the experimental probability of recieving a red folder with the ...
*October 27, 2010 by Tori*

**random sampling**

sometimes it is difficult or impossible to determine the population size before selecting a random sample. describe how you would go about selecting a random sample of trees from a 1-square mile area of forest.
*February 3, 2009 by Anonymous*

**math**

what is the probability of winning a lottery game where the winning number is made of 6digits from 0-9 chosen at random? i do not undestand how to solve please help
*April 9, 2009 by Gaby*

**math**

A box contains five blue, eight green, and three yellow marbles. If a marble is selected at random, what is the probability that it is yellow? 1 3/16 3/8 1/3
*November 19, 2009 by chris allen*

**Statistics**

Five cards are drawn at random without replacement from and ordinary deck of 52. What is the probability all 5 cards are from the same suit?
*April 6, 2010 by Kassie*

**math **

A raffle sells 68 tickets numbered 1 through 68 and one ticket is drawn at random. What is the probability that the number drawn is a multiple of 6 or 7?
*April 21, 2011 by Kathy*

**math**

. A box contains five blue, eight green, and three yellow marbles. If a marble is selected at random, what is the probability that it is not blue?
*June 9, 2011 by CC*

**math**

At a political rally there are 20 republicians, 13 democrates, 6 independents. If a person is chosen at random what is the probability that a) the person is either a democrate or and independent?
*April 16, 2012 by delilah*

**math**

A box contains five blue, eight green, and three yellow marbles. If a marble is selected at random, what is the probability that it is not blue?
*May 13, 2012 by free*

**math**

susan, joanne, and diane are triplets. susan has red, blue, green, and yellow sweaters. janne has green, red, purple, and white sweaters. diane's sweaters are red, blue, purple, and mauve. each girl has only one sweater of each color, and will pic a sweater t wear at random. ...
*May 28, 2012 by carly*

**maths**

Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen uniformly at random from S and...
*June 10, 2013 by rishabh*

**Math**

The average hourly wage of employees of a certain company is $14.58. Assume the variable is normally distributed. If the standard deviation is $3.99, find the probability that a randomly selected employee earns less than $9.79.
*July 12, 2014 by Shelagh*

**Math**

The average hourly wage of employees of a certain company is $14.24. Assume the variable is normally distributed. If the standard deviation is $3.27, find the probability that a randomly selected employee earns more than $18.98.
*July 12, 2014 by Shelagh*

**maths**

5. There are two groups of subjects one of which contains 5 science subjects and 3 engineering subjects and the other consists of 3 science and 5 engineering subjects. An unbiased die is cast. If the number 3 or number 5 turns up, a subject is selected at random from the first...
*December 28, 2012 by Anonymous*

**statistics**

approximately 300 millions golf balls were lost in the united states in 2009 assume the number of gold balls lost in an 18 hole is distributed as a poisson random variable with a mean of 5 balls
*February 23, 2013 by Anonymous*

**Math (please help steve)**

Brilli the ant randomly placed a token into a square on a 2×100 chessboard according to a probability distribution P. The token is then moved uniformly at random to one of the horizontally, vertically, or diagonally adjacent squares. The probability that the token is in a ...
*July 16, 2013 by Danny*

**statistics**

2. A researcher measures the heart rate in a population of runners and finds they have an average heart rate of µ = 50, σ = 5. You do not need to show a graph, only computation work. 2A. Based on the average heart rate cited above, what proportion would we expect to have ...
*June 27, 2014 by chris*

**algebra2**

Two cards are drawn at random froma standard deck of 52 cards without replacement. What is the probability if drawing a 7 and a king in that order?
*June 9, 2010 by Tosha*

**Math**

If a voter in the poll is selected at random What is the probability that he or she voted for Phil Montoya? Phil- 400 Eric-260 Alice-340
*March 1, 2012 by DianeCurry*

**College Algebra**

The letters in the word probability are written on separate slips of paper. One slip of paper is drawn at random. Find P(b)
*December 11, 2013 by Sarah*

**MATH Prob.**

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers. A) 4/3 B) 1/81 C)1/64 D)3/4 I automatically think D.
*August 9, 2009 by Twg*

**Math**

Can somebody help me solve this problem ? I am not so good with probability. - A bag contains 2 green marbles and 3 white marbles. One marble is drawn at random and not replaced. Then a second marble is drawn. What is the probability that the first marble is white and the ...
*January 29, 2013 by Chris*

**math**

The probability of choosing a 6 at random from a standard deck of playing cars is 1/13.Use this information for 1 and 3. 1. what is the complement of the event of choosing a 6 ? 2. What is the probability of the complement of the event of choosing a 6 ? 3. You roll a standard ...
*April 24, 2014 by thomas*

**mathematics**

The probability of choosing a 6 at random from a standard deck of playing cars is 1/13.Use this information for 1 and 3. 1. what is the complement of the event of choosing a 6 ? 2. What is the probability of the complement of the event of choosing a 6 ? 3. You roll a standard ...
*April 24, 2014 by thomas *

**Statistics **

1. A large video rental chain recently decided to change its rental policy, allowing an unlimited return date instead of requiring that movies be returned the next day. The marketing team reasoned that this would greatly increase the popularity of their stores, and also that ...
*November 22, 2010 by lina *

**Math**

Cepheid variables are vital for measuring the distances of relatively nearby galaxies. What is the probability of finding a cepheid variable star? State ALL your assumptions
*April 30, 2013 by Karla*

**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*

**Math**

How can you classify the 2 examples that you gave in part c? Is it: Simple random sample Systematic random sample Voluntary response sample Convenience sample Or Stratified random sample? Thank you.
*September 2, 2008 by Happyface*

**Probability**

We have k coins. The probability of Heads is the same for each coin and is the realized value q of a random variable Q that is uniformly distributed on [0,1]. We assume that conditioned on Q=q, all coin tosses are independent. Let Ti be the number of tosses of the ith coin ...
*April 3, 2014 by A*

**Algebra II**

1) A red die and a blue die are tossed. What is the probability that the red die shows a 3 and the blue die shows a number greater than 3? Answer: 3/5 2) Tickets are numbered 1 to 50 and placed in a box. Three tickets are drawn at random without replacement. What is the ...
*March 30, 2008 by Lucy*

**math-probability**

The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?
*November 30, 2009 by GG*

**math**

Duke Maverick worked for a packaging company. One Day, Duke recieved four seperate orders and acidentally mixed up the addresses, so he applied the address labels at random, what is the probability that exactly three packages were correctly labeled? If three were labeled ...
*February 22, 2007 by Nina*

**probability and statistics**

a set of 10 cards consists of 5 red cards and 5 black cards. the cards are shuffled thoroughly and i choose one at random, observe its color, and replace it in the set. the cards are thouruoghly reshuffled and i again choose a card at random, observe its color and replace it ...
*November 24, 2008 by Derek*

**Mathematics**

A professor gives a test with 100 true-false questions. If 60 or more are necessary to pass, what is the probability that a student will pass by random guessing?
*October 2, 2007 by Jen*

**math**

One card is selected at random from an ordinary set of 52 cards. Find the probability of each of the following events: a spade and a 5 are drawn. a jack is not drawn. Thanks for any help with this.
*January 31, 2010 by Joan*

**math**

One card is selected at random from an ordinary set of 52 cards. Find the probability of each of the following events: b. A spade and a 5 are drawn. d. A jack is not drawn
*April 19, 2010 by crystal*

**math**

a box contains 4 white,6 red, and 8blue marbles.what is the probability,expressed as a common fration,that one marble,drawn at random,will be red?
*February 22, 2011 by Anonymous*

**math**

How many digit number greater than 200 but less than 300 can be obtained from 1234,and what is the probability that a number choosen at random falls into this range
*June 6, 2012 by Yinka*

**algebra math**

A deck has 12 cards numbered 1 to 12. Ashley needs a number greater than 9 to win a game. If she selects a card at random, what is the probability that she will win?
*June 3, 2014 by kayla*

**College Level Probability**

Four different written driving tests are administered by the Motor Vehicle Department. One of these four tests is selected at random for each applicant for a driver's license. If a group of 5 applicants (consisting of 2 women and 3 men) apply for a license, what is the ...
*February 23, 2009 by James*

**math ASAP please**

1. Which of the following is an example of a dependent event? (1 point) flipping two coins rolling a number cube and spinning a spinner choosing two scoops of ice cream choosing a cookie at random, eating it, and then choosing another at random 2. Which of the following is an ...
*March 30, 2013 by Delilah*

**math**

I look at a random time of day at a digital clock (that shows times from 1:00 through 12:59). What is the probability that (ignoring the colon) I see a palindrome such as 8:08? Express your answer as a common fraction.
*November 15, 2012 by bob*

**Math**

*Sigh* Can someone explain to me how I would work thru this problem? An honest coin tossed n=3600 times. Let the random variable Y denote the number of tails tossed. (a) find the mean and the standard deviation of the distribution of the random variable Y (b) what are the ...
*October 5, 2006 by SherylA*

**Alegebra 1**

Urn A has balls numbered 1 through 7. Urn B has balls numbered 1 through 5. A ball is selected at random from urn A and then a ball is selected at random from urn B. What is the probability that a 4 is drawn from A followed by a 2 from B?
*September 8, 2009 by maria*

**Math Probability **

If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments
*April 16, 2012 by Antonio*

**Math (Probability)**

An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn from urn A? (A) 7/14 (B) 49/88 (C) 39/88 (D) ...
*October 11, 2012 by AngelG*

**Math (Probability)**

An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn from urn A? (A) 7/14 (B) 49/88 (C) 39/88 (D) ...
*October 11, 2012 by AngelG*

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