5,341 Answered Questions for the topic probability

Probability Math Algebra 1 Algebra 2

04/17/21

Calculate the probability of k successes for a binomial experiment consisting of n trials with the probability p of success on each trial: k ≥, n=5, p=0.2
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Probability Math Algebra 1 Algebra 2

04/17/21

Calculate the probability of picking 8 cards from a stand 52-card deck, with replacement, and getting exactly 3 spades.
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04/16/21

Problem on probability

Three cards are selected at random without replacement from a deck which contains 3 red, 3blue, 3 green, and 3 black cards. Give a sample space for this experiment and define the events:A: all the... more
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Probability

04/16/21

Basic Probability question

A cigarette company packs 1to 5 different slips, labelled a, b,c,d,e, respectively, with each pack it produces. Suppose that you buy 2 packs of cigarettes of this brand. What is a good sample space... more
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Probability Statistics

04/16/21

In the rolling or two fair dice calculate the following

P(Sum of the two dice is 9)=P(sum of the two dice is 6)=P(sum of the two dice is not 7)=P(sum of the two dice is 5 or 8)=P(sum of the two dice is not 4 and not 10)=
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Probability Math Statistics

04/15/21

Given that there are 1, 485 people you need to take for a survey for their drink preferences. Determine the sample if the error tolerance is 5%
how to calculate this help
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Probability Math Spinner White

04/14/21

Probability Question
A spinner has 10 equal pieces, 4 white, 3 black and 3 gray. Linda spun it 50 times. She got 17 White, 14 Gray, and 19 black. Assuming that the spinner is fair, compute the theoretical probability... more
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Probability

04/13/21

Find the probability that the yearly energy consumption of a randomly selected house is more than 1100 kWh.
yearly energy consumption levels for houses are normally distributed with a mean of 1200 kWh and a standard deviation of 200 kWh. Find the probability that the yearly energy consumption of a... more
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Probability Geometry

04/13/21

A bowl contains 25 balls numbered 1 to 25. A ball is drawn and its number is noted. Without replacing the first ball, another ball is drawn.

The probability that the numbers on both balls are odd numbers is___
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Probability Statistics

04/13/21

confidence interval question
In an experiment to assess the effects on rats of exposure to cigarette smoke, 11 animals were exposed and 11 control animals were not exposed to smoke from unfiltered cigarettes. At the end of the... more
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Probability

04/12/21

What is the probability a student will get cold food from  Location A
In a particular day, if a  student eats in campus, 50% of the time will be in the  Location A, 30% of the time at the Location B, and 20% of the time at Location C. If he eats at the  Location A,... more
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Probability Statistics

04/12/21

Express the confidence interval 67.9 % ± 5.9 % in the form of a trilinear inequality.
Express the confidence interval 67.9%±5.9% in the form of a trilinear inequality._% <p< %_
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Probability Statistics

04/12/21

Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a sample of size 280 with 126 successes
Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a sample of size 280 with 126 successes. Enter your answer as an open-interval (i.e.,... more
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Probability Statistics

04/12/21

Assume that a sample is used to estimate a population proportion p. Find the 99.5% confidence interval for a sample of size 87 with 37.9% successes.
Assume that a sample is used to estimate a population proportion p. Find the 99.5% confidence interval for a sample of size 87 with 37.9% successes. Enter your answer as an open-interval (i.e.,... more
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Probability Statistics

04/12/21

How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=27%. You would like to be 98% confident that... more
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Probability

04/11/21

Statistics and probability
a programmer plans to develop a new software system. in planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. how... more
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Probability

04/11/21

A person buys a single ticket, what will their expected net gain be?
A lottery consists of 5,000 tickets of $ 10 each. 4000 tickets only were sold and among them are: 300 tickets which bring 50 $ each; 200 tickets that bring $ 100 each and 100 tickets that bring $... more
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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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
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