5,341 Answered Questions for the topic probability

Probability Statistics

02/21/21

Given these sets
Given the sets U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {1, 2, 4, 5, 8}, and B = {0, 1, 2, 4, 8}, use De Morgan's Laws to find the indicated set. (Enter your answers as a comma-separated list. Enter... more
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Probability Statistics

02/21/21

Given these sets
Given the sets U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {0, 1, 6, 7, 8}, and B = {0, 4, 6, 8, 9}, use De Morgan's laws to find the indicated set. (Enter your answers as a comma-separated list. Enter... more
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Probability

02/19/21

What is the probability that 2 people out of 20 have the same birthday?
Please provide an easy probability formula to determine the probability that 2 people out of 20 have the same birthday.
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Probability Statistics

02/18/21

Binomial Distribution
fit a binomial distribution to the following data ?x 0 1 2 3 4 5 6 Total f 5 18 28 12 7 6 4 80
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Probability Statistics

02/18/21

Binomial Distribution
1) The ratio of the probability of 3 successes in 5 independent trials to the probability of 2 successes in 5 independent trails is 1/4 , what is the probability of 4 success in 6 independent... more
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Probability

02/18/21

probabilty question

For a revolver with five chambers and one bullet, write the questions for which each of these solutions are the answer.Solution A: (4/5)(4/5)(1/5) = 0.13Solution B: (1/5) + (4/5)(1/5) +... more
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Probability

02/17/21

As only 3 students came to attend the class today, find the probability of exactly 4 students to attend the class tomorrow
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Probability Math Statistics

02/16/21

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. Find the probability that a worker selected at random makes between $300 and $350.
I need to the percentage.
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Probability Math

02/16/21

I need help understanding the steps to take for each question please!
The executives in a company are four women and three men. Three are to be chosen at random to attend a management seminar.(a) If one of the executives is chosen at random to draw the names out of a... more
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Probability

02/16/21

Consider two random variable X and Y
Consider two random variable X and Y with following relationY = 2X+3The probability distribution of X is given as follows:X 3 4 6p(X) 0.3 0.4 0.3Find mean and variance of distributions X, Y.
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Probability

02/16/21

Elementary probability
A box contains 3 black balls, 2 white balls... A ball is picked from the bag and then replaced, a second ball is chosen, what is the probability that 1. They are both black. 2. One is black and one... more
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Probability Math Statistics

02/16/21

Card Probability

what is the probability that EXACTLY, not at LEAST, but EXACTLY,1 out of 3 cards is a spade, with the three cards drawn from a 52 card deck?
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Probability

02/14/21

What is the 80th percentile for this exam?

Standard deviation 16Mean Score 100
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Probability

02/14/21

What percentage of the population scored between 80 and 110 points on this exam ?
Mean Score 100Standard Deviation 16
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Probability

02/14/21

What percentage of the population scored over 80 points on this exam

Standard deviation (16)Mean score (100)
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Probability Statistics

02/14/21

If x is normally distributed with mean µ and standard deviation σ, and given that the probability that x is less than 32 is 0.0228, find the value of µ.
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Probability

02/13/21

What is the probability of rolling a sum of 11 on a standard pair of six-sided dice? Express your answer as a fraction or a decimal number rounded to three decimal places, if necessary.
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02/13/21

Slow pitch baseball, mean:28 and standard deviation:2.1. Wooden baseball, mean:33 and standard deviation:3.2. Find probability that a slow pitch softball bat weighs more than a wooden baseball bat?
The distribution of the weights of slow pitch softball bats and wooden baseball bats are each approximately normal.
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Probability Statistics Z Score

02/12/21

Statistics question HELP
Every year "Nathan's hotdog stand of Coney Island NY holds a hot dog eating contest. Assume the that number of hot dogs eaten by contestants last year was normally distributed with a mean of 40 and... more
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Probability

02/12/21

What is the probability you pick a student in the school and they prefer to use Tik-Tok OR they are a Junior? (Write as a percent rounded to the nearest hundredth)
Tik-Tok Snapchat TotalFreshman 345 122 467Sophomore 289 203 492Junior 178 109 287Senior 103 ... more
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Probability

02/12/21

What is the probability you pick a student in the school and they prefer to use Tik-Tok AND they are a Junior? (Write as a percent rounded to the nearest hundredth
tik tok Snapchat TotalFreshman 345 122 467Sophomore 289 203 492Junior 178 109 287Senior ... more
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Probability

02/12/21

A bag contains 7 green marbles, 3 blue marbles, 2 red marbles, 4 purple marbles, and 9 black marble. What is the probability that you will draw a purple OR blue?
(Write as a decimal rounded to the nearest tenth
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Probability

02/12/21

A bag contains 5 green marbles, 3 blue marbles, 7 red marbles, 4 purple marbles, and 11 black marble. What is the probability that you will draw a Green OR Red marble? (Write as a reduced fraction)
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Probability

02/12/21

A bag contains 5 green marbles, 3 blue marbles, 7 red marbles, 4 purple marbles, and 11 black marble. What is the probability that you will draw a Green OR Red marble? (Write as a reduced fraction)
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Probability

02/12/21

Convert the fraction to a percentage and round to the nearest tenth. 4/63
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