5,385 Answered Questions for the topic probability

Probability Math Statistics Mean

04/10/21

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If P(−b<z<b)=0.273, find b.
And if possible, could you include the way you reached the answer?
Follows • 1
Expert Answers •1
Probability

04/10/21

If I had to get a total of at least 18 from dice rolls, how do I figure out how many variations of dice rolls?

If I had to get a total of at least 18 from dice rolls, how do I figure out how many variations of dice rolls?
Follows • 1
Expert Answers •1
Probability

04/10/21

Math probability

In a class of 28 students, 19 have a cat and 6 have a dog. There are 5 students who do not have a cat or a dog. What is the probability that a student who has a cat also has a dog?
Follows • 1
Expert Answers •1
Probability Algebra 1

04/09/21

In a class of 30 students, 4 of them have caught the flu. If a teacher randomly selects 2 students, what is the probability that both of them do not have the flu?
In a class of 30 students, 4 of them have caught the flu. If a teacher randomly selects 2 students, what is the probability that both of them do not have the flu?
Follows • 2
Expert Answers •2
Probability Algebra 1

04/09/21

A jar of coins contains 8 quarters, 6 dimes, and 10 pennies. If you randomly draw two coins, what is the probability of drawing two quarters?
A jar of coins contains 8 quarters, 6 dimes, and 10 pennies. If you randomly draw two coins, what is the probability of drawing two quarters?
Follows • 1
Expert Answers •1
Probability Algebra 1

04/09/21

help! A bag of marbles contains 5 blue marbles, 3 green marbles, and 2 purple marbles. What is the probability of drawing a green marble, removing it, and then drawing a blue marble?
A bag of marbles contains 5 blue marbles, 3 green marbles, and 2 purple marbles. What is the probability of drawing a green marble, removing it, and then drawing a blue marble?
Follows • 1
Expert Answers •1
Probability Algebra 1

04/09/21

Cindy owns 3 cats, 2 dogs, a rabbit, and 5 mice. If she randomly chooses the order to feed her pets, what is the probability that a cat will eat first and a dog will eat second?
Cindy owns 3 cats, 2 dogs, a rabbit, and 5 mice. If she randomly chooses the order to feed her pets, what is the probability that a cat will eat first and a dog will eat second?
Follows • 1
Expert Answers •1
Probability Algebra 1

04/09/21

Algebra 1 Probability
In a group of 40 people, a fourth of them have black hair and a fifth of them have blonde hair. If 2 people are chosen at random from the group, what is the probability that the first will have... more
Follows • 1
Expert Answers •1
Probability Algebra 1

04/09/21

Probability question
A refrigerator contains 10 bottles of water, 7 bottles of apple juice, and 13 bottles of orange juice. If 2 drinks are taken at random from the refrigerator, what is the probability that both... more
Follows • 1
Expert Answers •1
Probability Algebra 1

04/09/21

Probability question
A refrigerator contains 10 bottles of water, 7 bottles of apple juice, and 13 bottles of orange juice. If 2 drinks are taken at random from the refrigerator, what is the probability that both... more
Follows • 1
Expert Answers •1
Probability Algebra 1

04/09/21

A box contains 9 orange crayons, 13 grey crayons, 7 purple crayons, and 11 blue crayons. If you randomly pick 2 crayons from the box, what is the probability that neither of them is purple?
A box contains 9 orange crayons, 13 grey crayons, 7 purple crayons, and 11 blue crayons. If you randomly pick 2 crayons from the box, what is the probability that neither of them is purple?
Follows • 1
Expert Answers •1
Probability Math Statistics

04/09/21

A bag contains 50 balls, 20 blue and 30red. Two balls are taken one after another without replacement. Find the probability of getting 2 red balls?.
Follows • 1
Expert Answers •1
Probability Math Statistics

04/09/21

A coin was tossed 400 times and head appeared 221 times. Test the hypothesis that the coin is unbiased.
Follows • 2
Expert Answers •1
Probability Math Statistics

04/09/21

Please find the question below:
In a group of 200 graduate engineering students 100 are enrolled in an advanced course instatistics 50 are enrolled in a course in OR and 30 are enrolled in both. How many of thesestudents are not... more
Follows • 1
Expert Answers •1
Probability

04/09/21

Probability math question

Suppose you pay $1 to play a game in which a pair of fair (6-sided) dice is rolled. If a sum of 6,7, or 8 comes up you win $5. If a 2 or 12 comes up you win $3. Otherwise you lose the dollar you... more
Follows • 1
Expert Answers •1
Probability

04/09/21

Aleks Assignment
A science class has 5 girls and 5 boys in the seventh grade and 5 girls and 3 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a... more
Follows • 1
Expert Answers •1
Probability Math

04/08/21

What is the correct mean absolute deviation of the 10 plants?
Mr. O'Lear is conducting an experiment that involves 10 plants. He initially determined that the plants had a mean height of 72 centimeters and a mean absolute deviation of 8.5 centimeters. He... more
Follows • 1
Expert Answers •1
Probability Statistics

04/08/21

How many ways can a chef arrange 8of 12 spice jars on a spice rack?
Follows • 1
Expert Answers •1
Probability

04/08/21

A fair coin is tossed trice. Let X be the number of tails that are observed.
Construct the probability distribution of X.
Follows • 1
Expert Answers •1
Probability

04/07/21

Calculus probability
Assume that thermometer readings are normally distributed with a mean of 0 degrees C and a standard deviation of 1 degree C. A thermometer is randomly selected and tested. Find the probability... more
Follows • 1
Expert Answers •1
Probability

04/07/21

what's the probability of drawing a Jack, queen or king from a deck of cards over 3 draws?
Follows • 1
Expert Answers •1
Probability

04/07/21

Let the test statistic T have a t-distribution when Ho is true.

Give the significance level for each of the following situations: (Give your answers to 3 decimal places) (a) Ha:μ>μ0,n=16, rejection region t≥3.733 α=______ (b) Ha:μ≠μ0,n=31, rejection... more
Follows • 1
Expert Answers •1
Probability

04/07/21

Let the test statistic z have a standard normal distribution when Ho is true.

Give the significance level for the following: (Give your answers to 3 decimal places) Ha:μ<μ0, rejection region z≤−2.75 α=______
Follows • 1
Expert Answers •1
Probability

04/07/21

Quantative Literature
The probability that it will rain on any given day is 15% or 0.15. Find the probability it will rain at least once in the next three days.
Follows • 1
Expert Answers •1
Probability

04/07/21

If a person draws four cards from a standard deck (without replacing them), what is the probability that at least one of the cards is a face card?
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.