5,341 Answered Questions for the topic probability

Probability

03/02/21

Suppose 64% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?
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Probability Statistics

02/28/21

Probability: Calculate two events.
Let A and B be two events belonging to the same sample space, such that P (A) = 1/2, P(B) = 3/5 and P (A ∩ B) = 1/4. Calculate the probabilities of upcoming events: At least A or B occurs. A... more
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Probability

02/28/21

Probability: Calculate two events.
Let A and B be two events belonging to the same sample space, such that P (A) = 1/2, P(B) = 3/5 and P (A ∩ B) = 1/4. Calculate the probabilities of upcoming events: At least A or B occurs. A occurs... more
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02/28/21

Probability - Word Problem (Data Sufficiency Question)
In a tin, there are only gold rings and silver rings. If Rose were to simultaneously pick two rings from the tin, what is the probability that she will not pick any gold rings? Statement (1) The... more
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02/26/21

statistics help! standard deviation
The standard deviation of Y is 1.236.Choose the best interpretation of the standard deviation from those given below.A) The most common number of siblings among high school students is 1.236.B) The... more
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Probability Math Statistics Sat

02/26/21

statistics help! binomials
Faith is a 95% free throw shooter. At practice, each player shoots 20 free throws. Let X =the number of free throws Faith makes out of 20 shots.Enter your answers rounded to 3 decimal places. Use... more
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Probability Math Statistics Sat

02/26/21

statistics help! discrete and continuous variables
Identify if the following scenarios describe a discrete or continuous random variable. X = The number of persons in an emergency room W = The weight of an elephant at the zoo  H = The areas of... more
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02/26/21

STATISTICS HELP! Faith is a 95% free throw shooter. At practice, each player shoots 20 free throws. Let X = the number of free throws Faith makes out of 20 shots.
Faith is a 95% free throw shooter. At practice, each player shoots 20 free throws. Let X =the number of free throws Faith makes out of 20 shots.Which of the following explains why this scenario... more
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Probability

02/26/21

If two fair dice are​ rolled, what is the probability that the total showing is either even or less than ​four?
If two fair dice are​ rolled, what is the probability that the total showing is either even or less than four?
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Probability Math Statistics

02/26/21

What mark would Johnny have had to score in Mathematics for his performance to be equivalent to that for English?
Johnny scored 55 in an English test for which the mean score was 50 and the standarddeviation was 6. He scored 64 in a Mathematics test for which the mean score was 59and the standard deviation 9.... more
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Probability

02/26/21

1200 students enrolled. 451 students take Calculus, 656 students take Statistics and 313 students take both. What is the probability that a random student takes Calculus or Statistics?
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Probability

02/26/21

Out of 35 students, 18 have at least one brother and 19 have at least one sister. 3 students have both brothers and sisters. How many students do not have either a brother or a sister?
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Probability Statistics

02/25/21

What are the odds of identifying a man in a photo?
I have a feeling the answer is going to go completely over my head, but I'm asking anyway. I have a photograph taken in 1939 of a boat. I know a fair amount about the crew and circumstance at the... more
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Probability

02/25/21

How do you solve this problem? What is the probability that you are not dealt a 10?
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Probability Algebra

02/25/21

Probability Question (Survey Based)
1. A survey found that 23% of people like reading books, 44% of people like going to the movies, 12% enjoy going hiking, and 19% enjoy traveling. Find the probability that someone liked reading and... more
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Probability

02/25/21

true or false question

Suppose you toss a fair coin 50 time and it lands heads 20 times. Determine whether each of the following statements is True or False.a) The Law of Large Numbers says that the coin must land 30... more
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Probability

02/25/21

You win a dollar 55% of the time, and your customer wins a dollar 45% of the time. How much profit would you expect to have if 7500 games are played?
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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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