5,385 Answered Questions for the topic probability

Probability Math

12/07/20

Proof of independence of random variables X and Y
Prove that random variables X and Y are independent if and only if FX,Y(x,y) = FX(x)FY(y)
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Probability

12/06/20

Bernoulli's theorem, probability
In an exam, candidates fail with a chance of p = 0.6, (and pass with a chance of q = 1 - p = 0.4).A total of 90 are taking the exam.We would like to estimate p based on Bernoulli's theorem.What is... more
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Probability Math Geometry Math Help

12/04/20

geometry probabllity
in contract negotiations between a local government agency and its workers, it is estimated that there is a 50% chance that an agreement will be reached on the salaries of its workers. it is... more
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Probability Math Statistics

12/04/20

Probability, queing problem
N ski slopes meet at the bottom of a valley, the lifts to the slopes are here in one place, there are waiting lines for the lifts.After how many laps are we expected to ski on the most difficult... more
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Probability

12/04/20

Fifteen people entered a cooking contest and the top 3 contestants win a cash prize. What is the percent chance any contestant wins a cash prize?
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Probability

12/03/20

A drug test is accurate 96% of the time. If the test is given to 1900 people who have not taken drugs, what is the probability that at least 78 will test positive? Probability =
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Probability

12/03/20

An urn contains 8 white and 3 red balls.if two ball are drawn at random, find the probability of both are white,both are red and one is of each colourr
An urn contains 8 white and 3 red balls.If two balls are drawn at random . Find the probability of both are white,both are red, and one is of each colour
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Probability Statistics

12/03/20

Suppose there are 8 green tags, 12 white tags and 4 red tags left to use as name tags at a conference...
Suppose there are 8 green tags, 12 white tags and 4 red tags left to use as name tags at a conference. If tags are given out randomly at the registration desk,a) what is the probability that the... more
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Probability Statistics

12/02/20

Probability Question
In an office, there are three secretaries, four accountants, and two receptionists. If a committee of three is to be formed, find the probability that one of each will be selected.
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Probability

12/01/20

Probability, How many four-letter words can be made from the 10 letters "ABCDEFGHIJ"?
If repetition is allowed:If repetition isn't allowed:Each word must begin with an 'A' and letters can be repeated:
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Probability

12/01/20

Distribution and Statistics
A two-year investment breaks even at the end of two years but yielded a 36% loss in the first year. Find the average annual rate of return for this investment.____%Any help is much appreciated.
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Probability Math

12/01/20

What is the Probability
For a few weeks, a music producer kept track of newly released songs on a music streaming website. He recorded the music genre and number of times the song was played on its... more
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Probability

11/30/20

Probability without replacement
1.A jar contains 4 red balls and 7 blue balls. Two balls are drawn at random from the jar without replacement. What is the probability that exactly one of the balls is red.2. A jar contains 5 red... more
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Probability

11/28/20

Expected value, CDF
Suppose we have a positive, continuous probability variable X, the following expression for the variable does not depend on s: E (X − s | X ≥ s), where E( ) Is the expected value.What is the... more
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Probability

11/27/20

Choosing given number of items from different subsets
A gathering is attended by A women and B men.Women individually, independently of each other, have a p probability of getting to know each other, while men's chance of getting to know each other is... more
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Probability Statistics

11/26/20

reccurence relation
Suppose that an and bn are both solutions to a recurrence relation of the form xn = αxn-1 + βxn-2. Prove that for any constants c and d, c an + d bn is also a solution to the same recurrence... more
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Probability Statistics Reccurence

11/26/20

Probability .

solve the given reccrence relation problemxn = xn-1 + 2n , x0 = 5
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Probability

11/26/20

Given the Equation

Solve the following recurrence relationsxn = 2xn-1+xn-2-3xn-3, x0=2, x1=1, x2=4
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Probability Math Statistics

11/25/20

If 8 pairs of fair dice are rolled, approximate the probability that the sum of the values obtained (which ranges from 16 to 96) is between 30 and 40 inclusive.
If 8 pairs of fair dice are rolled, approximate the probability that the sum of the values obtained (which ranges from 16 to 96) is between 30 and 40 inclusive.
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Probability Math Statistics

11/25/20

what is the approximate probability that fewer than 175 chips will be defective?
Question 5 [12 marks] Each computer chip made in a certain plant will, independently, be defective with probability .2. If a sample of 1,000 chips is tested, what is the approximate probability... more
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Probability Math Statics

11/25/20

Consider the following data on the diameter of a rivet. Assume a normal population.
Consider the following data on the diameter of a rivet. Assume a normal population. 6.68 6.66 6.62 6.72 6.76 6.67 6.70 6.72 6.78 6.66 6.76 6.72 6.76 6.70 6.76 6.76 6.74 6.74 6.81 6.66 6.64 a)... more
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Probability

11/25/20

The amount of time to complete a physical activity in a PE class is approximately normally normally distributed with a mean of 37.3 seconds and a standard deviation of 5.6 seconds.

The amount of time to complete a physical activity in a PE class is approximately normally normally distributed with a mean of 37.3 seconds and a standard deviation of 5.6 seconds.  What is the... more
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Probability Math Statistics

11/25/20

what is the approximate probability that fewer than 175 chips will be defective?
Each computer chip made in a certain plant will, independently, be defective with probability .2. If a sample of 1,000 chips is tested, what is the approximate probability that fewer than 175... more
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Probability Statistics

11/24/20

C(20, 8) = 20! ÷ [(8)!*(12)!] =

A caterer offers 20 different types of dessert. In how many ways can 8 of them be chosen for a banquet if the order doesn’t matter?
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Probability Statistics

11/24/20

What is the smallest number of different colors of tiles needed to form 44 squares so that no tile touches another of the same color along the entire edge
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