5,381 Answered Questions for the topic probability

Probability

09/29/20

What is the probability that a randomly selected freshman will enroll exactly one GE course and that course is not ENG10?
In a survey on college freshmen, the following information were gathered: All freshmen will enroll at least one general education (GE) course. 40% of the freshmen will enroll more than one GE... more
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Probability

09/29/20

Prove rigorously that an event E, independent of all other events, has probability equal to either 0 or 1.
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Probability Statistics Logic

09/29/20

An engineering system consisting of n components is said to be a k-out-of-n system (k . . . n) if the system functions if and only if at least k of the n components function.
Assume that each component independently works with probability 1/2. Find the conditional probability that component 1 is working, given that the system works, when k = 2, n = 3.
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Probability Statistics

09/29/20

If 12 cows are randomly selected from the very large herd to go on the truck, what is the probability their total weight will be over the maximum allowed 5784?
On the distance planet cowabunga, the weights of cows have a normal distribution with a mean of 462 pounds and a standard deviation of 38 pounds. The cow transport truck holds 12 cows and can hold... more
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Probability Statistics

09/26/20

I need help with a probability & statistics question
A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y) are given in the accompanying table. Write the linear regression... more
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Probability

09/26/20

How do I determine the probability I will draw three cards with a value of 8 or higher from a standard deck of cards when drawing five cards?
In this case aces=1, jacks=11, queens=12, kings=13, and jokers are removed from the deck.
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Probability

09/25/20

Find a probability distribution
A 6 sided and 4 sided die are rolled simultaneously. Let X be the number of twos rolled. Find the probability distribution of X.
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Probability Math Physics Statistics

09/25/20

what is the minimum value of X 
in golf a typical hole is about 400-yards-long, while the cup measures a 4.25 inches in diameter. Suppose that, with every swing, you hit the ball X percent closer to the center of the hole. For... more
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Probability

09/25/20

In a class of 30 students, a student can be classified as junior or senior, and a member of one of the three competitive teams: red, blue, and green teams.
(a) How many possible outcomes are there in the experiment?(b) What is the probability that at least one of the students is a junior student?(c) What is the probability that no student is a member... more
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Probability

09/21/20

probability and stats
Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 13 14 44 Female 16 6 4 26 Total 33 19 18 70 If one student is chosen at random,Find the... more
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Probability

09/21/20

probability and statistics
At a particular college 17 percent of the students major in Business. All Business majors are required to take a Statistics Course. Of the students not majoring in Business, 38 percent of them... more
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Probability Math

09/21/20

My car gets 29 miles per gallon, and gasoline costs $2.20 per gallon. If we consider only the cost of gasoline, how much does it cost (in dollars) to drive each mile?
Need help with this one. Keep getting it wrong.
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Probability Discrete Math

09/20/20

How many ways can you rearrange the letters of the word OPTICAL so that the vowels are all next to each other?
How many ways can you rearrange the letters of the word OPTICAL so that the vowels are all next to each other. For example OIAPTCL?
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Probability Integral Calculus

09/19/20

PLEASE CAN ANYONE SLOVE 1(A) ONLY. THANK YOU
Probability theory tells us that if the average time between events is k, the probability that x, the time between events, is between a and b is given by,P(a ≤ x ≤ b) = ∫ ba f(x) dx ------ equation... more
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Probability

09/19/20

4. Two green tiles, one red tile, and a blue tile are put into a paper bag.
a) What is the probability that a green tile is drawn, followed by a blue tile, assuming the first tile is replaced before the second tile is drawn?b) How does the answer to part a) change if the... more
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Probability

09/18/20

What’s the probability of at least one card being an ace & exactly one black card?
Three cards are drawn at random without replacement from a deck of 52 cards. What’s the probability of the events a) at least 1 card is an aceb )exactly 1 Card is black
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Probability Math Statistics Logic

09/18/20

how many guesses should you expect to make to guess the secret word?
In Guess My Word each day, there is a secret word, and you try to guess it as efficiently as possible by typing in other words. After each guess, you are told whether the secret word is... more
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Probability Statistics

09/18/20

The probability that an event will happen is P(E)=16/23. Find the probability that the event will not happen.
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Probability Math

09/17/20

If a patient chosen at random is known to smoke, what’s the probability they have lung cancer?
At a certain hospital, 45 patients have lung cancer, 35 patients smoke, & 30 have lung cancer & smoke. Suppose the hospital contains 225 patients. If a patient chosen at random is known to... more
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Probability

09/17/20

What is the probability that two of the marbles are red when drawn?
A bag contains 9 red marbles, 7 white marbles, and 7 blue marbles. You draw 5 marbles out at random, without replacement. What is the probability that all the marbles are red? Can you show me how... more
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Probability Integral Calculus

09/16/20

Please can anyone solve 1(a) and 1(b). I need help. Thank you in advance.
Probability theory tells us that if the average time between events is k, the probability that x, the time between events, is between a and b is given by,P(a ≤ x ≤ b) = ∫ ba f(x) dx ------ equation... more
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09/16/20

Math in the modern world
Alan, Ben and Carl collect NBA cards. They exchange cards amongthemselves. According to the following scheme: Alan gives Ben as manycards as Ben has and Carl as many cards as Carl has. After that,... more
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Probability

09/15/20

You choose a marble at random from a bag containing 2 red marbles, 4 green marbles, and 3 blue marbles. Find each probability
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Probability

09/14/20

A coin is tossed and an eight - sided die numbered 1 through 8 is rolled . Find the probability of tossing a tail and then rolling a number greater than 5

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Probability

09/14/20

Probability Question
A computer breaks down 25% of the time and is operational 75% of the time. What is the smallest number of independent computers that must be running so that there is atleast a 99% chance that at... more
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