5,341 Answered Questions for the topic probability

10/28/20

Probabilty Question: Color of the Marble

Mr.W puts two blue marbles and one green marble into his pocket. Then he randomly takes out one. After recording the color of the marble, he puts the marble back. He repeats this 6 times. a.What is... more
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Probability Statistics

10/28/20

How do I find the probability ?
"Suppose 4-year-olds in a certain country average 3 hours a day unsupervised and that most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation... more
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Probability

10/27/20

Suppose 60% of students eat proper nutritious meals daily, and 20% exercise regularly. Also, there is a probability of 25% that a student does both.
Suppose 60% of students eat proper nutritious meals daily, and 20% exercise regularly. Also, there is a probability of 25% that a student does both. Find the probability that student eats proper... more
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Probability

10/26/20

A single die is rolled 7 times. What is the probability that a six is rolled exactly once, if it is known that at least one six is rolled?
Can you show the steps to help me understand?
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Probability

10/26/20

In a sample of 1446 U.S. registered voters, 217 said that JFK was the best
president since WWII. Two registered voters are selected at random without replacement.(a) Find the probability that both registered voters say that JFK was the best.(b) Find the probability that... more
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Probability

10/25/20

A five digit code using numbers from 1 to 6 is used for remote access to voicemail. Determine the probability that a randomly selected code has the same first 2 digits.
A five digit code using numbers from 1 to 6 is used for remote access to voicemail. Determine the probability that a randomly selected code has the same first 2 digits.I am not sure the answer may... more
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Probability Statistics

10/24/20

A particular fruit's weights are normally distributed, with a mean of 756 gr. and a st dev of 14 gr The heaviest 20% of fruits weigh more than how many grams? Give your answer to the nearest gram.
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Probability

10/24/20

Find the probability

A bag contains 10 balls, of which 7 are green and 3 are white. A ball is picked atrandom from the bag and its color is noted. The ball is not replaced and a second ballis then picked out. Find the... more
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Probability Statistics

10/23/20

How do I find the probability for this question?
Hi, if someone could help me solve this problem that would be great, thank you"A distribution is given as X ~ U(0, 12)."Find P(x > 9).  (Enter an exact number as an integer, fraction, or decimal.)
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Probability Math Statistics

10/23/20

What value of p makes this an evenly matched game of one-on-one, so that both players have an equal chance of winning before the coin is flipped?
Now that LeBron James and Anthony Davis have restored the Los Angeles Lakers to glory with their recent victory in the NBA Finals, suppose they decide to play a game of sudden-death, one-on-one... more
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Probability

10/21/20

Anybody know the answer to this?
100 people play a lottery, and each has a probability 0.02 of winning the jackpot. Each person spends 1 dollar to buy a ticket, so the lottery owners receive a total of 100 dollars. From this pool... more
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Probability

10/21/20

A softball player bats in a game. The at bat can result in an out, getting on base, or a home run. Find the number of possible outcomes for the sample space.
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Probability

10/21/20

What is the experimental probability that the next client to get a haircut Marshall’s will have blond hair?
Brown hair 7 black hair 7 blond hair 2
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10/20/20

Algebra question
Let f(x) = λ2xe-λx , x>0 , be the the г (2, λ) density function and let F(x) be its cdf. Solve the following interal equation using Laplace transforms:m(x) = F (x) + integration (upper =x ,... more
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10/20/20

How do I get the mean/average with the given standard deviation 7ml and percentile which is 10%?
In the word promblem, it stated that a machine was set so that 10% of a 370ml can can contain less that 356ml.I'm not good with word problems and I'm confused which is which.
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Probability Statistics

10/19/20

How do I find the expected value for this game?
Hi, I'm having a bit of trouble trying to figure out the expected value for this game, so if you could help that would be really great and helpful. thanks so muchA game involves selecting a card... more
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Probability Math Statistics

10/18/20

Suppose there are N candidates instead of three. What is the probability of a runoff?
On Nov. 3, the residents of X City will elect a mayor from among three candidates. The winner will be the candidate who receives an outright majority (i.e., more than 50 percent of the vote). But... more
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Probability

10/17/20

The probability of everyone getting a new table?
We have 24 students in a classroom each with their own table. We decide to rearrange the seats and we give everyone a random place. What is the chance that no one sits back at his former table?
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Probability Statistics

10/17/20

I need help finding the expected value for this game
A game involves selecting a card from a regular 52-card deck and tossing a coin. The coin is a fair coin and is equally likely to land on heads or tails. If the card is a face card, and the coin... more
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Probability Statistics

10/16/20

Statistics and probability

1. Assume that there are 12 frozen dinners: 5 pasta, 4 chicken, and 3 seafood dinners. The student selects 5 of them.What is the probability that at least 2 of the dinners selected are pasta... more
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Probability Statistics

10/16/20

How Do I Fill Out This PDF Table for This Problem?
I need help with this problem for my statistics class.Question: "A theater group holds a fund-raiser. It sells 100 raffle tickets for $7 apiece. Suppose you purchase four tickets. The prize is two... more
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10/16/20

Probability questions for discrete mathematics.
1. Let X = {2, 3, 4}. Suppose that m is chosen uniformly at random from X. Then n is chosen uniformly at random from X. Let G be the random variable whose value is gcd(m, n). Let A be the event... more
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Probability Statistics

10/16/20

normal distribution and/ or probability distribution
If a person tests positive for Tuberculosis (TB) and starts treatment immediately, it takes on average 6 months (183 days, with a standard deviation of 14 days) of treatment until they are... more
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Probability Statistics

10/16/20

A dealer splits a standard 52-card deck of cards into 5 piles. The dealer tells you that one of the piles consists of all the face cards and aces.
Each of the remaining piles contains a single suit (so, one of the piles contains all the hearts with face values 2–10, another pilecontains all the spades with face values 2–10, etc.). The dealer... more
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Probability Math Statistics

10/16/20

Maria''s phone has a 4-digit passcode, each digit is chosen from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}.

The phone is designed to allow a passcode to be entered once every 5 seconds. Unfortunately, Maria has lost her memory. To get into the phone, she has to guess the passcode, but she cannot remember... more
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