5,385 Answered Questions for the topic probability

Probability Math Statistics

02/25/21

Statistics probability

A manufacturing machine has a 1% defect rate. If 7 items are chosen at random. what is the probability that at least one will have a defect?
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Probability Statistics Maths

02/24/21

Maths Word Problem - Statistics and Expected Value
Paul selects two cards, at random and withoutreplacement, from a standard pack of cards.What is the expected number of hearts that hegets?
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02/24/21

One Sample T-Test
I need help with my homework and i'm struggling to get this one, I have to conduct a one sample t-test in my Statistics Subject. It says "prove or disprove the history teacher's claim by performing... more
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02/23/21

How can I make a regular even small stream of income from the Stock Market?
Day trading or regular trading can help you build wealth. It's great if you start young.
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Probability

02/23/21

challenge. He biked for 65,68,45,48 AND 63 miles on the first five days. How many miles does he need to bike on the last day so that his average (mean) is 59 miles per day?
I WANT YOU TO SOLVE FOR PROBABILITY
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Probability

02/23/21

What is the probability that you knew the answer to a question, given that you answered it correctly?
Suppose you are taking a multiple-choice test with 4 choices for each question. In answering a question on this test, the probability that you know the answer is 0.7. If you don't know the answer,... more
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Probability Math

02/22/21

How many options

A certain model of automobile is available in seven exterior colors, four interior colors, and three interior styles. In addition, the transmission can be either manual or automatic, and the engine... 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 = {2, 4, 7, 8, 9}, and B = {0, 5, 6, 7, 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 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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