744 Answered Questions for the topic Probability & Statistics

Probability & Statistics

07/16/18

In a survey of 100 children, it is found that 47 have at least one brother, 58 have at least one sister and that 32 children have both.
In a survey of 100 children, it is found that 47 have at least one brother, 58 have at least one sister and that 32 children have both. How many of the children have no brothers and sisters?
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Probability & Statistics

07/16/18

In a group of 200 school students, 135 are enrolled in sciences classes, 110 are enrolled in accounting classes, and 88 are enrolled in both of the classes.
In a group of 200 school students, 135 are enrolled in sciences classes, 110 are enrolled in accounting classes, and 88 are enrolled in both of the classes. (i) Draw a suitable Venn diagram and... more
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Probability & Statistics

07/16/18

In a group of 200 school students, 135 are enrolled in sciences classes, 110 are enrolled in accounting classes, and 88 are enrolled in both of the classes. (
In a group of 200 school students, 135 are enrolled in sciences classes, 110 are enrolled in accounting classes, and 88 are enrolled in both of the classes. (i) Draw a suitable Venn diagram and... more
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Probability & Statistics

07/15/18

Lottery Ticket Chance
You need to pay one dollar to buy an instant lottery ticket. In this instant lottery game, you have 10% chance to win a one dollar bill and 5% chance to win a five dollar bill. You are interested... more
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Probability & Statistics Probability Data Management

07/09/18

probability question help please
A school’s athletics department can send 3 track athletes and 2 field athletes to an upcoming meet. The school has 14 track athletes and 10 field athletes who qualify. Usecombinations to determine... more
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Probability & Statistics

07/08/18

replacement value
Assume that you have a car worth $ 6 650 and you wish to insure it for its full replacement value if it is stolen. If there is a 1% chance that the car will be stolen, what would a fair premium... more
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07/01/18

Standard Normal Probability
A group of retailers models that the amount of dollars X that an individual will spend in christmasshopping has a normal distribution with mean μ = $1100 and standard deviation σ = $330.... more
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Probability & Statistics

07/01/18

probability
A sample of 50 homeowners who recently hired a landscaping service yielded the following information about their landscaper.Number of HomeownersWould you Recommend Your Landscaper to a... more
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07/01/18

Standard Normal Probability ANSWER CHECK
A group of retailers models that the amount of dollars X that an individual will spend in christmasshopping has a normal distribution with mean μ = $1100 and standard deviation σ = $330.... more
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Probability & Statistics

06/27/18

Find the probability that a randomly chosen student did not receive an A in chemistry
In a recent semester at a local univeristy, 540 students enrolled in both General Chemistry and Calculas. Of these students, 72 received an A in chemistry, 65 recceived an A in calculas and 31... more
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06/24/18

Percentage of salmon in the river with the 68-95-99.7 rule
The length X of salmon in a river has normal distribution with mean μ = 17 inches and standarddeviation σ = 4 inches.   What percent of the salmon in the river are between 9 inches and 17... more
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Probability & Statistics Statistics Probability Homework Due Tomorrow

06/24/18

Percentage of cartoons with the 68-95-99.7 rule
Milk cartons are filled by a machine. The mean volume of a carton of milk is μ = 1.0 quart and thestandard deviation is σ = 0.06 quart. Assume that the volume of milk in the cartons is... more
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06/24/18

Height Distribution with the 68-95-99.7 Rule
The heights distribution of a population is assumed to be normal, with mean height μ = 66.5 inches,and the standard deviation height σ = 2.4 inches. What is the percentage of people who are... more
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Probability & Statistics Statistics Probability

06/24/18

Number of Possible Ways Statistics Problem
A soccer team of 11 players has to be selected from a group of 19 players. How many differentteams are possible?     A committee of 4 has to be formed out of a group of 17 students. How many... more
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Probability & Statistics

06/20/18

If you make a random guess for the answer to that question, what is the probability that you r answer is the correct answer Pierce?
"Who was the 14th president of the United States: Taylor, Fillmore, Pierce, or Buchanan?" If you make a random guess for the answer to that question, what is the probability that your answer is the... more
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Probability & Statistics

06/18/18

Probability Question
The height of n people is 160cm with a stdev of 8. Any person whose height is greater than 170 is defined as tall. - Half of the tall people have a height greater than “H” cm – find the value of h?
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Probability & Statistics

06/18/18

Probability
Suppose that the probability that a student owns a smartphone is 0.7, the probability that they own a laptop is 0.6, and the probability that they own both is 0.5. What is the probability that a... more
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Probability & Statistics Statistics Probability Probability Problems

06/17/18

Probability
Toss a coin 5 times. What is the probability that there are exactly 2 Heads and 3 tails?   Five men and three women applied for 2 scholarships. What is the probability that both the winnerswill... more
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Probability & Statistics Math Statistics Probability

06/07/18

Assume you get an average of 2 texts per hour on a weekend. Find the probability that in any one hour interval there will be:
a.) 0 textsb.) Exactly 2 textsc.) At most 3 texts **Show your work for each part of the problem, please!
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Probability & Statistics

06/06/18

In a group of 40 people
10 are healthy and every person of the remaining 30 has either high blood pressure, high level of cholesterol or both. If 15 have high blood pressure and 25 have high level of cholesterol.How many... more
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Probability & Statistics

05/31/18

In an examination the probability distribution of scores (X) can be approximated by normal distribution with mean 66.2 and standard deviation 9.1.
Suppose one has to obtain at least 55 to pass the exam. What is the probability that a randomly selected student passed the exam?
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Probability & Statistics

05/30/18

Mr. Gle brought a cooler containing drinks to his daughter’s soccer game. There are 15 sports drinks, 5 cans of orange juice, and 3 sodas. If a drink is selecte
 Mr. Gle brought a cooler containing drinks to his daughter’s soccer game. There are 15 sports drinks, 5 cans of orange juice, and 3 sodas. If a drink is selected at random from the cooler, what is... more
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Probability & Statistics

05/25/18

A binomial distribution has 65% rate success. Out of 15 trials, what is the probability of at least 10 being successful?
 A binomial distribution has 65% rate success. Out of 15 trials, what is the probability of at least 10 being successful?
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Probability & Statistics

05/23/18

a hat contains 4 marbles; one red, one blue, one orange, and one green. Two marbles are selected at random without replacement from the hat.
I don’t understand it 
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Probability & Statistics

05/22/18

Probability Question
In a group of 50 boys, 18 own a laptop, 20 own a desktop, and of these 6 own both. What is the probability that a boy picked from this group at random owns either a laptop or a desktop computer,... more
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