# What is the probability that the random variable has a value greater than 4?

40,906 results

math
a student claims that if a fair coin is tossed and comes up heads 5 times in a row, then according to the law of averages the probability of tails on the next toss is greater than the probability of heads. What is your reply?

math
A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply?

probability
John has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 110, 210 and 310, respectively. If he flips each of the 3 coins once, the probability that at least 1 heads appears is p. What is the value of 1000p?

Algebra
The variable Z is directly proportional to X. When X is 6, Z has the value 72. What is the value of Z when X = 13

Finance in Healthcare
Understanding the difference between fixed and variable costs, what area of a health care facility or physician practice do you think would have a greater amount of variable costs than fixed? What would you suggest to lower the fixed costs for the same area?

Statistics
Suppose the heights of 18-year-old men are approximately normally distributed, with mean 66 inches and standard deviation 4 inches. (a) What is the probability that an 18-year-old man selected at random is between 65 and 67 inches tall? (Round your answer to four decimal ...

Algebra
There are 4 problems that I don't understand how to solve so, please help me. A numerical explanation with words explanation would be nice. Thank you tutors. Rewrite each equation so it is in the form ax + b = c or x + d/e = f, where x is a variable. Then solve the equation. 1...

probability;math
A card is chosen at random from a deck of 52 cards It is then replaced and then a second card is chosen.What is the probability of choosing a jack and then an eight?

Probability and statistics
1. In a City, out of 20000 news paper subscribers, exactly 5000 subscribe to The Hindu. An advertising firm surveys 500 different subscribers of these 20000 subscribers. The random variable X = the number of The Hindu subscribers surveyed by the advertizing firm, has Choose ...

probability
The random variables X and Y have the joint PMF pX,Y(x,y)={c⋅(x+y)2,0,if x∈{1,2,4} and y∈{1,3},otherwise. All answers in this problem should be numerical. Find the value of the constant c. c= Find P(Y<X). P(Y<X)= Find P(Y=X). P(Y=X)= Find the following ...

Math
A nickel is flipped and a dime is flipped. 1. What is the probability of obtaining exactly one head? A bag contains five balls numbered 0 through 4. Two balls are chosen at random in succession. The first ball is replaced before the second is chosen. 1. What is the probability...

Math HELP! Ms.Sue
A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the probability of selecting ...

Algebra, Probability needed ASAP
1: A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form. A). Find the theoretical probability of selecting a pink rubber band. B). Find the ...

probability
Consider the random variables X, Y and Z, which are given to be pairwise uncorrelated (i.e., X and Y are uncorrelated, X and Z are uncorrelated, and Y and Z are uncorrelated). Suppose that E[X]=E[Y]=E[Z]=0, E[X2]=E[Y2]=E[Z2]=1, E[X3]=E[Y3]=E[Z3]=0, E[X4]=E[Y4]=E[Z4]=3. Let W=a...

Math
1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

Math
1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

Maths Probability
Let X and Y be independent random variables, each uniformly distributed on the interval [0,2]. Find the mean and variance of XY. E[XY]= 1   var[XY]= ??? Find the probability that XY≥1. Enter a numerical answer. P(XY≥1)= ???

Math Probability
Let X and Y be independent random variables, each uniformly distributed on the interval [0,2]. Find the mean and variance of XY. E[XY]=   var[XY]= Find the probability that XY≥1. Enter a numerical answer. P(XY≥1)=

Probability
Consider three random variables X, Y, and Z, associated with the same experiment. The random variable X is geometric with parameter p∈(0,1). If X is even, then Y and Z are equal to zero. If X is odd, (Y,Z) is uniformly distributed on the set S={(0,0),(0,2),(2,0),(2,2)}. ...

LAN
1. System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for parts (a) to (d). a) ...

Telecommunications
1. System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for parts (a) to (d). a) ...

math
can you please try to help me understand this? Q:The table below shows a distribution and the observed frequencies of the values of a variable from a simple random sample of a population. Perform a chi-square goodness-of-fit test, at the specified significance level, to decide...

math
For a fair coin tossed three times, the eight possible simple events are HHH, HHT, HTH, THH, HTT, THT, TTH, TTT. Let X = number of tails. Find the probability distribution for X by filling in the table showing each possible value of X along with the probability that value ...

Math
i have my final tomorrow and this question was on my review? im having trouble with probability so... "your cat walks over the computer keyboard while you're away and hits three random letters. what is the probability that the word RAT appears" So on my calculator do i 26 nCr ...

Probability
How do I determine the probability of selecting a card greater than 9 or a black card?

Computers
System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for parts (a) to (e). 50 ...

statistics
In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 12 patients using the drug is selected. If you wanted to find the probability that exactly three will have this mild side effect, what would be the ...

statistics
Suppose a basketball player, Player A made 80% of her free throws last season and that she continues to shoot free throws at the same rate. Assume that free throw attempts are independent. Let the random variable X be the number of free throws that player A makes in her next ...

math solutions
solve the equation abx=cy for each of following the variable x the variable a the variable c solve the equation ay/x the variable y the variable z the variable x solve each of following for variable y 3y=ab ab=cy ayc=bx bx/y=R zy/x=b

Probability
You are given the set of letters ( A, B, C, D, E ). What is the probability that in a random five-letter string (in which each letter appears exactly once, and with all such strings equally likely) the letters A and B are next to each other?

Probability
hundred people apply for three jobs. 110 of the applicants are women. (a) If three persons are selected at random, what is the probability that two are women? (Round the answer to six decimal places.)

Probability
Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 8 10 12 30 Female 4 11 3 18 Total 12 21 15 48 If one student was chosen at random, find the probability that the student got an A.

Probability
b. What is the probability that a person selected at random from this HWAS data set will be shorter than 65" or taller than 70"? The same data set

math Study guide
1. The table shows the results of spinning a four-colored spinner 50 times. Find the experimental probability and express it as a decimal. P(not red) = ? (1 point) a 0.6 b 0.4 c 0.2 d 0.3 2. You roll a number cube 20 times. The number 4 is rolled 8 times. What is the ...

Math/Prob
Claire takes a five-question true-false test. She hasn't studied, so she guesses at random. With her ESP she figures she has a 60% probability of getting any one answer wrong. A. What is the probability of getting an answer wrong? (Do you think they want me to ignore the ESP ...

probability
Tad draws three cards at random, without replacement, from a deck of ten cards numbered 1 through 10. What is the probability that no two of the cards drawn have numbers that differ by 1? Express your answer as a common fraction.

Math
There is a 60% that your math teacher will give a pop quiz tonight and, due to the fact that you have a soccer game, there is an 85% chance you will not be able to do your math homework. You decide that you will do the homework if the probability of there being a pop quiz and ...

statistics
the random variable x is normally distributed with a mean of 75 and a standard deviation of 15.0. For this distribution, what is the twenty-third percentile?

Math
Random variable X is normally distributed with mean 10 and standard deviation 2. Compute the following probabilities. a. Pr(X<10) b. Pr(X<11.04) I don't know where to start.

Finite
Assume that the coin is weighted so that Pr[H] = [ 1/11], and that it is flipped 9 times. The random variable X is defined as the number of heads in the 9 flips. What is E[X]?

College Statistics
A random variable X has a Gamma distribution with (alpha = a, beta = b). Show that P(X > 2ab) < (2/e)^a. hint: X > c is equivalent to e^Xt > e^ct

Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals). c. P(z -1.5) d. P(z -2.5)

Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals). a. P(z -1.5) b. P(z -2.5)

math
find the cumulative function, mean and variance of the following continuous pdf of a random variable X. f(x)=x/2 for 0<x<1 f(x)= 1/2 for 1<x<=2 f(x)=(3-x)/2 for 2<x<3 f(x)=0 otherwise

stats
Given that z is a standard normal random variable, find z for each situation (to 2 decimals). 1.The area between -z and z is 0.2128

There is a 60% that your math teacher will give a pop quiz tonight and, due to the fact that you have a soccer game, there is an 85% chance you will not be able to do your math homework. You decide that you will do the homework if the probability of there being a pop quiz and ...

Algebra
The value of almost everything you own, such as a car, computer, or appliance, depreciates over time. When the value decreases by a fied amount each year, the depreciation is called straight-line depreciation. Suppose your car has an initial value of \$16,750 and depreciates \$...

Statistics
The probability of a randomly drawn individual having blue eyes is 0.51. A) What is the probability that seven people drawn at random all have blue​ eyes? ​(b) What is the probability that one of the sample of seven has blue​ eyes?

Math Probability Distribution
A probability distribution has a mean of 57 and a standard deviation of 1.4. Use Chebychev’s inequality to find the value of c that guarantees the probability is at least 96% that an outcome of the experiment lies between 57 - c and 57 - c. (Round the answer to nearest whole...

HELP!! MATH!
A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the probability of selecting ...

Intro to Local Area Networks
1. System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for parts (a) to (d). a) ...

statistics
The US Environmental Protection Agency reports the average fuel costs for various makes of cars. In recent years the fuel costs for mid‐size Japanese cars averaged \$1200. Suppose that the annual fuel costs for various makes of automobiles are normally distributed and ...

Math
Three hundred people apply for three jobs. 80 of the applicants are women If three persons are selected at random, what is the probability that one is a woman? (Round the answer to six decimal places.)(d) If three persons are selected at random, what is the probability that ...

Probability
Consider a fire alarm that senses the environment constantly to figure out if there is smoke in the air and hence to conclude whether there is a fire or not. Consider a simple model for this phenomenon. Let Θ be the unknown true state of the environment: Θ=1 means ...

Math
I have got 18 red , 12 green, 5 blue and 5 yellow balls in the bag. What is the probability that I pick excatly 2 green when I pick 4 at random ? What is the probabily that none are yellow after I pick 4 at random ? Thanks.

Managerial ECON
The chief economist for Argus Corporation, a large appliance manufacturer, estimated the firm’s short- run cost function for vacuum cleaners using an average variable cost function of the form AVC = a + bQ + cQ2 where AVC dollars per vacuum cleaner and Q number of vacuum ...

math
It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the number of people who ...

math
It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the number of people who ...

Maths - Probability q2
Five cards are lettered A, B, C, D, E Three cards are chosen at random one after the other without replacement and are in the order shown below First, Second, Third What is the probability that the cards spell the word BED

math
Which statement is true about the value of (5−n)(5n)? a.For all n, the value of the expression is 0. b.For n<0, the value of the expression is greater than 1. c.For n<0, the value of the expression is less than 1. d.For all n, the value of the expression is 1.

Probability
thirty animals are to be used in a medical experiment on diet deficiency: 3 male and 7 female rhesus monkeys, 6 male and 8 female dogs. If one animal is selected at random, what is the probability of getting a chimpanzee or a dog?

math prob
It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the number of people who ...

math/algebra
solve each of the following systems by substitution. 16) 5x -2y = -5 y - 5x = 3 20) 8x -4y = 16 y = 2x - 4 28) 4x -12y = 5 -x + 3y = -1 Step one: Solve on of the equations for one of the variables. y=2x-4 Step two:Substitute the expression for the variable found in step one ...

maths
In a basket of fruit, there are 6 grapes,11 bananas and 13 oranges, if one fruit is chosen at random, what is the probability that the fruit is either grape or banana. i.find the probability of grape and banana i.find the probability of not banana

statistics
From past experience it is felt that the random variable, X, the age of a mother at the birth of her first child, is normally distributed with a mean of 21.3 and a variance of 16. Find the probability that a randomly selected mother: (a) has her first child before age 16 (b) ...

MAths
A unit square is drawn in the Cartesian plane with vertices at (0,0),(0,1),(1,0),(1,1). Two points P,Q are chosen uniformly at random, P from the boundary of the square and Q from the interior of the square. The line L1 through P and Q is drawn. The probability that the points...

Probability
MY MAIN PROBLEM IS FIGURING OUT WHAT DISCRETE DISTRIBUTION TO USE, BERNOULLI, BINOMIAL, DISCRETE UNIFORM, GEOMETRIC NEGATIVE BINOMIAL, OR POISSON. Every time I choose one, it's the incorrect one. Is there some way I can easily find out which one to use...

Algebra, Probability needed ASAP
1: A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form. A). Find the theoretical probability of selecting a pink rubber band. B). Find the ...

statistics
Find the indicated binomial probabilities. Round to the nearest 3 decimal places. In a local college, 20% of the math majors are women. Ten math majors are chosen at random. 1) What is the probability that exactly 2 are women? 2) What is the probability that 2 or less women ...

algebra3
which inequality is tge solution of 6x negative 3 greater than or = to 7 plus 4x? a.}x is greater than or =to negative 5 b.}x is greater than or= to 5 c.}x is less than or = to 5 d.}x is less than or = to negative 5 Your problem: 6x - 3 ≥ 7 + 4x Solve an inequality like ...

Maths
2a) assume that adult males have footless which are normally distributed with mean 24.6 cm and standard deviation 1.05 cm. Calculate the probability that an adult male has a foot length is greater than 27 cm. My answer - 2 2b) assume adult females have foot lengths which are ...

Probability/Statistics
Assume 20 oz. cola bottles are filled so that the mean amount of liquid contained in the bottle is 20 oz and the standard deviation is .12 oz. If a bottle is randomly selected, find the probability that the number of ounces in that bottle is greater than 20.21 oz.

stat
Problem 2. THE PROBABILITY THAT A RANDOMLY CHOSEN SALES PROSPECT WILL MAKE A PURCHASE IS 0.20. IF A SALESMAN CALLS ON SIX PROSPECTS, A. WHAT IS THE PROBABILITY THAT HE WILL MAKE EXACTLY FOUR SALES? B. WHAT IS THE PROBABILITY THAT THE SALESMAN WILL MAKE FOUR OR MORE SALES? C. ...

statistics
B} The average number of mosquitoes in a stagnant pond is 70 per square meter with a standard deviation of 8. If 36 square meters are chosen at random for a mosquito count, find the probability that the average of those counts is more than 70.9 mosquitoes per square meter. ...

Probability
What is the probability of spinning a number greater than 5 OR less than 3 on this spinner? This problem has a picture of a spinner with 8 sections divided equally. The sections are labeled: 1,2,3,4,5,6,7,8.

Math
Someone tossed a coin 80 times.The coin landed on heads 60 times. Is the experimental probability greater than or less than theoretical probability?

Elementary Statistic
twenty-five percent of all death are caused by diseases of the heart Ischemic heart disease accounts for 16.4% of all death and heart failure for 2.3% choose one death at random. What is the probability that it is from ischemic heart disease given that it was from heart ...

Math
A department store is holding a drawing to give free shopping sprees to two lucky customers. There are 15 customers who have entered the drawing: 4 live in the town of Gaston, 6 live in Pike, and 5 live in Wells. In the drawing, the first customer will be selected at random, ...

Given a population comprised of 30 bats, 15 gloves, and 60 balls, if sampling is random and one at a rime without replacement, what is the probability of obtaining a bat, a glove, and a bat in that order if three objects are sampled from the population?

Algebra 2
Suppose the experimental probability is 1/3 that a carton of eggs contains at least one broken egg. Use the simulation of 20 trials to find the experimental probability that 3 cartons selected at random contain only unbroken eggs.

math
Two cards are selected at random without replacement from a well-shuffled deck of 52 playing cards. Find the probability of the given event. (Round your answer to three decimal places.) find the probability that A pair is not drawn.

Math Help ASAP SETS & Probability
Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 2 10 17 29 Female 7 15 4 26 Total 9 25 21 55 If one student was chosen at random, find the probability that the student got a C.

math
1. The table shows the results of spinning a four-colored spinner 50 times. Find the experimental probability and express it as a decimal. P(not red) = ? red | blue | green | yellow ---------------------------------------- 20 | 10 | 9 | 11 (1 point) a 0.6 b 0.4 c 0.2 <...

elementry math
A box contains three black balls and two gold balls. A ball is selected at random, its color is recorded, and it is then replaced. A second ball is then selected at random and its color recorded. The outcome associated with this type of selection is an ordered pair (first draw...

chin
You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer draws, he/she wins £3 ...

statistics
You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer draws, he/she wins £3 ...

statistics
You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer draws, he/she wins £3 ...

algebra
A bag contains 9 marbles: 2 are green, 4 are red, and 3 are blue. Laura chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that both marbles she chooses are blue? Write your answer as a fraction in simplest form.

stat
the average number of pushups a United States Marine does daily is 300, with a standard deviation of 50. A random sample of 36 marines is selected. What is the probability that the sample mean is at most 320 push-ups? With a mean of 300, you are looking for a sample using a ...

Probability
There are 3 lucky tickets among 10 lottery tickets. 3 tickets are drawn at random. What is a probability that one ticket selected randomly from those three is lucky? PLEASE HELP

Statistics-Probability
An instructor will choose 3 problems from a set of 7 containing 3 hard and 4 easy problems. If the selection is made at random, what is the probability that only the hard problems are chosen?

math
2) In a certain instant lottery game, the chances of a win stated as "3 in 23". Express the indicated degree of likelihood as a probability value between 0 and 1 3) A certain company reduced its management staff from 20 managers to 16. The company claimed that 4 managers were ...

stat probability
At a certain college, there were 780 science majors, 320 engineering majors, and 390 business majors. If one student was selected at random, the probability that they are a business major is?

math
CountingOutcomes and Theoretical Probability A computer store sells 4 models of computer (m1,m2,m3 m4. Each model can be fitted with 3 sizes of hard drive (A,B,C,) 1- Find the sample space. 2- What is the probability of choosing a model with a size C hard drive? 3- What is the...

Science
Which of the following best describes the dependent variable in an experiment? A- the variable that is measured B- the variable that is manipulated C- the variable that you can see D- the variable that is most common (My guess is A) Photosynthesis is the process whereby plants...

PROBABILITY
There are 3 lucky tickets among 10 lottery tickets. 3 tickets are drawn at random. What is a probability that one ticket selected randomly from those three is lucky?

PROBABILITY
There are 3 lucky tickets among 10 lottery tickets. 3 tickets are drawn at random. What is a probability that one ticket selected randomly from those three is lucky?

PROBABILITY
There are 3 lucky tickets among 10 lottery tickets. 3 tickets are drawn at random. What is a probability that one ticket selected randomly from those three is lucky?

PROBABILITY
There are 3 lucky tickets among 10 lottery tickets. 3 tickets are drawn at random. What is a probability that one ticket selected randomly from those three is lucky?

statistics and probability
A shipment of 20 computers contains 4 defective machines.Two computers are selected at random without replacement and tested for being detective. (a). is this a binomial experiment? why or why not solution. Yes. because each trial can result in just two possible outcomes. (b...

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