3,456 Answered Questions for the topic probability

Probability

28d

probability and statistics

A club has 21 members, four of whom are executives. Five members are randomly selected to take part in a survey. a) What is the probability that four non-executive members are chosen?b) what is... more
Probability Statistics

29d

Regression to the mean (please help)

Suppose Mike is playing a coin game as follows. First he throws three fair coins into the air (First Toss). For each “heads”, he wins a dollar. Then, he tosses the three coins again (Second Toss).... more

29d

What is the probability that at least 1 odd number was recorded during the three drawings?

A box contains four numbered balls: 2, 6, 7. and 8. A ball is drawn at random from the box, its number is noted, and it is then returned to the box. This process is repeated two more times. What is... more

29d

how many committees are possible?

A class consists of 4 seniors, 5 juniors, and 1 sophomore. 4 of these 10 students will be chosen to serve on a committee. If no more than 1 senior may serve on the committee, then how many... more

29d

what is the probability that both red and blue marbles were removed from the bag?

There are 3 red and 4 blue marbles in a bag. Simultaneously at random, 3 marbles are removed from the bag. If at least 2 of the marbles removed from the bag are blue, then what is the probability... more

29d

How many codes do not contain the letter X?

A code is formed by arranging 3 not necessarily distinct letters from the set {W, X, Y, Z}.  ZYW and ZZX are examples of possible codes. How many codes do not contain the letter X?
Probability

29d

Random Walk Probability

Consider the infinite random walk on the integers that goes from i to i+1 in one move with probability 4/7, goes from i to i-1 in one move with probability 1/7, and finally goes from i to i-2 in... more
Probability

29d

Probability Question

If 10 people consisting of 5 married couples, are randomly arranged in a row, find the probability that no person is next to their spouse. Give the numerical value of this probability.
Probability

29d

Probability Question

A big box contains 14 pairs of shoes. If 9 shoes are randomly selected from the box, find the probability that there will be EXACTLY two complete pairs.
Probability

30d

I have a doubt in this question.

It is well known to the Public Health Service that Harry’s Restaurant givesonly casual attention to matters of cleanliness; consequently, the PublicHealth Service periodically closes the restaurant... more
Probability

30d

Help Please!!! .

A bag contains 9 marbles: 3 are green, 2 are red, and 4 are blue. Linda chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that both... more
Probability

30d

what is probability ?

A football player has 20 footall kits uniform in his closet suppose 12 of those kits are red and the other are blue he gets dressed in the dark so he just grabs a kit and is on he plays football... more
Probability

12/16/20

Markov Question

An auto insurance company classifies its customers in these categories poor, satisfactory, and preferred. Each year 15% of those in the poor category are moved to satisfactory and 5% of those in... more
Probability

12/14/20

Probability of joint pdf’s

What’s the probability of P(X•Y<1) Given the pdf’s fY(y)=3/8•y2 for 0<y<2fX(x)=3/8•x2 for 0<x<2its supposed to be around 0.08 but I just can’t find the right method
Probability

12/14/20

Assuming that the two machines starts at the same time, what is the probability that machine A manufactures the first product?

A company has two types of machines (A and B) to manufacture the same exact product. The manufacturing time of each product is independent of the others and can be modeled as an exponential random... more
Probability Statistics Finite Math

12/14/20

What do you think the probability vector is after 20 transitions of P?

Consider the following Markov chain 0 1/2 1/2P=3/10 7/10 0 1/2 0 1/2Probability Vector: W [ 3/11, 5/11, 3/11]What do you think the probability vector... more
Probability

12/13/20

Probability of a Proportion

Suppose that 78% of all dialysis patients will survive for at least 5 years.In a simple random sample of 100 new dialysis patients, what is the probability that the proportion surviving for at... more
Probability

12/13/20

Probability math

a container contains 7 yellow and 3 green balls. You draw  three balls at random. On each draw, if the three balls is yellow you set it  aside and if the ball is green you put it back in the... more
Probability Math Statistics

12/12/20

What is the inverse probability that the total of the roll of two six-sided dice is 10?

What is the inverse probability that the total of the roll of two six-sided dice is 10?
Probability

12/12/20

Probability Question

If 10 people consisting of 5 married couples, are randomly arranged in a row, find the probability that no person is next to their spouse. Give the numerical value of this probability.
Probability Math Statistics

12/11/20

Find P ( -1.2 < Z < -0.2 )

Find P ( -1.2 < Z < -0.2 )
Probability Math Statistics

12/11/20

A nutrition store in mall is selling....

A nutrition store in the mall is selling “Memory Booster,” which is a concoction of herbs and minerals that is intended to improve memory performance, but there is no good reason to think it... more
Probability

12/10/20

Combinations and Permutations

A group of 15 activists (7 Democrats, 6 Republicans and 2 Independents) want to form a committee so that they can change the world. The committee is to have 6 members on it, with 2 representatives... more
2 4 5 6 7 139

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