803 Answered Questions for the topic Probability & Statistics

Probability & Statistics Statistics

06/30/15

please help!!!
Out of all of the 2010 murder cases, 28.8% killed by family members, 53% by acquaintance and the remainder by stranger. What's probability that a randomly selected murder victim was killed by... more
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Probability & Statistics Statistics Question

06/30/15

please help!
In a recent survey, 15 people preferred milk, 27 people preferred coffee and 18 peoplepreferred juice as their primary drink for breakfast. If a person is selected at random, find theprobability... more
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Probability & Statistics

06/27/15

What is the probability of rolling a 4 on a ten sided die 5 times in a row?
What is the probability of rolling a 4 on a ten sided die 5 times in a row? I don't think the answer is as simple as 1 in 10,000 which would be a ten percent chance 5 times. 
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Probability & Statistics Math Statistics Probability

06/20/15

Probability Help!
1. Use the frequency distribution to find the expected value (mean), variance, and the standard deviation. Number of downloads (X) 27 28 30 31 32 Probability (P(X)) 0.15 0.2 0.3 0.25 0.1   2. You... more
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Probability & Statistics Math Statistics Probability

06/20/15

Probability!! 2
Thanks!   2. You have $10,000 to invest. After some investigating, you found two investment opportunities. Bond A has a return of 6.5% with a default rate of 2%. Bond B has a return of 8% with a... more
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Probability & Statistics Probability Problems

06/17/15

What is your expected value?
In a game you bet $1 and toss two coins. If two heads come up, you win a profit of 75 cents. If two tails come up, no one wins anything. Otherwise, you lose your dollar. What is your expected value... more
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Probability & Statistics Probability Problems

06/17/15

What is the expected cost to the company of a batch of 3000 tires?
A company manufactures tires at a cost of $40 each. The following are probabilities of defective tires in a given production run: probability of no defective tires: 10%; probability of 1% defective... more
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Probability & Statistics

06/16/15

If there are 100 different flavors, how many possible mixtures can be created?
If I have 100 different flavors, how many possible different flavors can be created?
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Probability & Statistics Finite Mathematics Bernoulli Trials

06/15/15

Bernoulli Principle
A certain drug was developed, tested, and found to be effective 80% of the time. Find the probability of successfully administering the drug to at least 10 out of 11 patients. (Round your answer to... more
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Probability & Statistics Math Probability Math Help

06/15/15

probability, binomial experiment
According to a report of the Nielsen company 65% of internet searches in may 2010 used the google search engine. assume that a sample of 20 searches is studied.    a) what is the probability that... more
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06/15/15

binomial experiment, probability
according to a report of the Nielsen company 65% of internet searches in may 2010 used the google search engine. Assume that sample of 20 searches is studied.   a) What is the probability that... more
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Probability & Statistics

06/14/15

A fair dice is rolled 8 times. what is the probability that you will get OVER five sixes
 hdhflhvjhvlv;kv;kv;kjb;v;khvkhv
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Probability & Statistics

06/12/15

An experiment selecting a student body president and vice president. All undergraduate students (freshmen through seniors) are eligible for these offices.
An experiment consists of selecting a student body president and vice president. All undergraduate students (freshmen through seniors) are eligible for these offices. How many sample points... more
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Probability & Statistics

06/11/15

determine P(F or G) by using the general addition rule
a probability experiment is conducted in which the sample space of the experiment is S={1,2,3,4,5,6,7,8,9,10,1112} event F={4,5,6,8} and Event G={10,11,12}. assume the outcome of each is equally... more
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Probability & Statistics Algebra 1 Probability

06/09/15

Find the standard deviation of the data set below. Round your answer to three decimal places.
3,5,7,7,9,11,12,13,15,17,18,19,19,19
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Probability & Statistics Algebra 1 Probability Word Problem

06/09/15

James has 33 coins in his pocket, all of them nickels and quarters. If he has a total of $2.25, how many quarters does he have?
James has 33 coins in his pocket, all of them nickels and quarters. If he has a total of $2.25, how many quarters does he have?
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Probability & Statistics

06/09/15

A thief steals an ATM card and must randomly guess the correct 4 digit pass code from a 9-Key key pad. Repetition Is allowed. What is the probability of a corre
I don't know what formula to use for this question 1/9 to the 9th power is way to large of a number.n where did i go wrong?
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Probability & Statistics Statistics Probability Statistics Question

06/06/15

Finding Probabilities
Let z be a standard normal random variable. Find P(0.48 < z < 2.3 and z > 1.9).   I tried to do them both separately and then putting them together but I ended up with the wrong answer.... more
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Probability & Statistics

06/04/15

with 90% confidence, how many dice rolls should I take so that I get at least one of each faces of the dice?
I want to know how long it would take me to get at least one of each of the dice's face. 
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Probability & Statistics Algebra 1 Probability Probability Problems

05/31/15

I need help with this difficult word problem
Before the 1976, California license-plate numbers consisted of three numbers (for example, EGT 893). In the summer of 1976, however, the state ran out of numbers of this type and started issuing... more
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Probability & Statistics Algebra 1 Probability

05/30/15

Which of the following are independent pairs of events? Check all that apply.
A. Being a bad swimmer and drowning.   B. Watching television and winning the lottery.   C. Flipping two coins and having both show heads.   D. Being a good swimmer and winning the... more
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Probability & Statistics Math Algebra 2 Algebra 2 Question

05/28/15

Algebra 2 help please??
Consider the set x= { #, $, @, ^, *}1. Find the numbers of subsets there are for set X.2. Find the number of 4- element subset of set X.I am so confused, anything helps, thank you!!!
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Probability & Statistics Algebra 2 Algebra 2 Question Algebra 2 Help

05/28/15

Algebra 2 help please??
Consider the set x= { #, $, @, ^, *} 1. Find the numbers of subsets there are for set X. 2. Find the number of 4- element subset of set X.   I am so confused, anything helps, thank you!!!
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Probability & Statistics Probability Probability Problems

05/20/15

Probability Problem
You play a gamed e that requires rolling a six-sided then randomly choosing a colored card from a deck containing 3 red cards, 8 blue cards, and 6 yellow cards.  Find the probability that you will... more
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Probability & Statistics Probability Word Problem Word Problem Help

05/20/15

how many different ways can the letters PROBLEM be arranged? Considering all of the possibles arrangements of the letters, what is the probability of actually s
Need help! 
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