5,395 Answered Questions for the topic probability

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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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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