744 Answered Questions for the topic Probability & Statistics

Probability & Statistics Chance

01/29/18

2. You have a dime and a penny. Flip them both, noting whether each coin lands on heads or tails. List all possible outcomes. Let E be the event that you get at
2. You have a dime and a penny. Flip them both, noting whether each coin lands on heads or tails. List all possible outcomes. Let E be the event that you get at least one head. List all the... more
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Probability & Statistics

01/29/18

What is the probability of rolling 7 or 11 with two fair dice?
What is the probability of rolling 7 or 11 with two fair dice?
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Probability & Statistics Probability Maths Mathematics

01/27/18

Easy question however, I somehow can't do it
a pupil travels to school either by MRT or by bus. Th probability that the pupil will be late for school is 1/12 if he travels by MRT and 1/9 if he travels by bus. a) if he travels by bus on two... more
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Probability & Statistics Probability Mathematics Chance

01/26/18

Probability
A bag contains 15 identical marbles. There are 7 red, 3 blue and 5 yellow marbles. A marble is picked out at random and not replaced. A second marble is then picked out at random and not... more
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Probability & Statistics Math Algebra 2 Probability

01/17/18

Algebra (Probability)
Orin is going to play a game that involves drawing marbles from a jar. There are 15 red, 75 yellow, and 10 blue marbles in the jar. If Orin draws a blue marble, he wins $10. If he draws a yellow... more
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Probability & Statistics Math Algebra 1 Algebra 2

01/16/18

Algebra 2 - Probability
On average, a very selective college admits 9 out of every 100 applicants. An admissions officer is reviewing a pile of 200 students' applications, and admits the first 17 students.What are the... more
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Probability & Statistics Math Statistics Probability

01/15/18

A game at the fair involves ping-pong balls numbered 1 to 18. You can win a prize if you correctly choose the 5 numbers that are randomly drawn.
A game at the fair involves ping-pong balls numbered 1 to 18. You can win a prize if you correctly choose the 5 numbers that are randomly drawn. What are your chances of winning?
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12/19/17

Probability for a draw
What is the probability of person A and person B selecting each other’s names in a draw for Secret Santa (20 participants in total)
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Probability & Statistics

12/12/17

find the chance of a king
. Two cards are drawn in succession from a pack of 52 cards. Find the chance that the first is a king and second a queen if the first card is (i) replaced, (ii) not replaced.
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Probability & Statistics

12/08/17

Probability help please
Bill has completed a 10-question multiplechoice test on which he answered 7 questions correctly. Each question hadone correct answer to be chosen from five alternatives. Bill says that he answered... more
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Probability & Statistics

12/03/17

If I have 30 red marbles, 15 yello and 55 green, what is the probability of pulling out a red or green marble?
probability 
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Probability & Statistics

11/29/17

Bill the baseball pitcher gives up a hit to 15% of batters. Joe the batter gets a hit against 30% of hitters. What are the odds Joe gets a hit against Bill?
Event A has a 15% chance of happening. Event B has a 30% chance of happening. In this case, If A happens, then B happens, if A doesn't happen B doesn't happen. 
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Probability & Statistics

11/27/17

a. probability that second marble is violet b. probability that both marbles are the same colors c. draw a tree diagram
An urn contains 5 red and 8 violet marbles. One marble is drawn from the urn and it will be replaced by two marbles of the other colour. Then a second marble is drawn.
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Probability & Statistics

11/20/17

Exam question
The probability of the student solving Q1 is 60% . If he solves it the probability of him passing the exam is 80% , if he doesn’t then the probability of failing is 55%.After the exam the student... more
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Probability & Statistics Math Algebra 1 Algebra 2

11/18/17

Question Below! Emergency! Assignment is Due by 3pm
Of the 193 member countries of the United Nations, 54 are in the African Group and 23 are in the Eastern European Group. Suppose that a country is selected at random from the members of the United... more
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Probability & Statistics Math Algebra 1 Probability

11/18/17

Question Below. Emergency! My Assignment is Due by 3pm
A jury has 12 jurors. A vote of at least 10 of 12 for "guilty" is necessary for a defendant to be convicted of a crime. Assume that each juror acts independently of the others and that the... more
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Probability & Statistics Math Algebra

11/17/17

Sets and Counting
Suppose there are three pitchers and three catchers at a baseball training camp. In how many ways can the six players be seated in a row if no one sits next to someone who plays the same position?
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Probability & Statistics

11/16/17

it is approximately 2000 jelly beans in the jar, which is closest to the difference between the number of yellow and green jelly beans?
20% green 25% yellow 15% other 40% red how is the answer 100
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Probability & Statistics

11/15/17

i would like a clear explanation of this problem
A box contains 6 red marbles and 8 blue marbles. If you randomly grab 5 marbles at a time, findthe probability that there will be(i) 3 red. (ii) 4 red. (iii) all red. (iv) none red (v) none blue
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Probability & Statistics Baye's Theorem

11/15/17

Bayes Theorem Help
Tommy is a football player who suffers an injury during the game. The team doctor looks at the injury and tells Tommy that he needs to run some tests and there is only a 20% chance he will... more
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Probability & Statistics

11/08/17

HELP PROBABILITY
5. The random variables X, Y have joint probability density functionf(x, y) = (Ce−x−e−x−2yey−1if x > 0 and y > 0,0 otherwise.(a) What is the value of C?(b) Are X and Y independent?(c) Find... more
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Probability & Statistics Statistics Permutations

11/07/17

Consider the word "BLESSINGS" use these letters ti count math "words". How many ways can we arrange the letters in a sequence?
I was thinking it may be 10!/5! but am not sure
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Probability & Statistics Probability Probability Problems

11/05/17

Questions about probability (Condition/Binomial random variable)
You have identical 30 balls; 5 black, 10 purple, 15 orange balls in a box.   Q1.If we take a ball, we make a mark on it and put it back to the box. We take one ball at a time. What is the... more
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Probability & Statistics

11/04/17

If I have 8 lions, 2 monkeys, 4 giraffes and 6 lepoards what is the probability of picking one animal and it being a monkey?
Need help please. 
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Probability & Statistics

11/04/17

statement is true
Which of the following statements is TRUE?  A. If all of the data values in a data set are identical, then the standard deviation is 1. B. The variance is one of the measures indicating... more
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