788 Answered Questions for the topic Probability & Statistics
Probability & Statistics
10/17/17
suppose a jar contains 377 red marbles and 332 blue marbles. If you reach in the jar and pull out 2 marbles at random, find the probability that both are red.
how marbles in the
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Probability & Statistics
10/16/17
Deck of Cards Probability Question
There are two decks of cards. Each deck has a red, a yellow, a blue, and a green card in it. If a card is drawn, from the first deck, and then a second card drawn from the second deck, what is the...
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Probability & Statistics
10/15/17
A wheel has 1 red, 2 blue, 3 yellow, 4, green, and 5 purple spaces of equal area. What is the probability of spinning yellow and then spinning another yellow?
Would the answer be 0.2? Please help.
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Probability & Statistics
10/13/17
Raffles have 100 tickets for sale, and I buy 80, so probability winning is 80%. What is probability for win one of two raffles-obviously more than 80%, but how
probability of winning raffle
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Probability & Statistics
10/09/17
Please anwer the below.
If it snows on game day there is a 32% chance the Jets will win. If it does not snow on game day there is a 41% chance the jets will win. There is a 29% chance that it will snow on game day. a....
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Probability & Statistics
10/06/17
What is the probability of selecting a jury of two students and five faculty?
The grade appeal process at a university requires that a jury be structured by selecting seven individuals randomly from a pool of eleven students and seven faculty. (a) What is the probability of...
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Probability & Statistics
10/05/17
I don't know how to do the question
The mean lifetime of a certain type of lightbulb produced by a manufacturing company is 200 months with a standard deviation of 30 months. Such a lightbulb will be guaranteed for 150 months by the...
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Probability & Statistics Playing Cards
10/03/17
One card is selected from a standard deck of 52 playing cards. What is the probability that the card is either a spade or a four?
For the Praxis Core exam
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10/02/17
Forged Signaute or not Probability
A document is signed with an ElGamal signature. The probability that a signature is forged is (.1). Find the probability that at least one of the three Rob’s signatures is forged.
10/02/17
Probability Randomly Selected Question
Usually, errors are found in 10% of lines of code written by software engineers at Error Free Code, Inc. What is the probability that in a randomly selected sample of 5 lines of code none of them...
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09/28/17
If P(B)=0.4, P(A|B)=0.5, P(B′)=0.6, and P(A|B′)=0.7, what is P(B|A)?
Statistics probability problem.
I could really use some help figuring out how to solve this.
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Probability & Statistics
09/28/17
Mason plays a game by flipping two fair coins. He wins the game if both coins land facing heads up. If Mason plays 200 times, how many times should he expect to
Mason plays a game by flipping two fair coins. He wins the game if both coins land facing heads up. If Mason plays 200 times, how many times should he expect to win
Probability & Statistics
09/26/17
an unfair coin has probability of .4 landing heads. The coin is tossed three times. What is the probability that it lands heads at least once
I need help solving this problem
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09/23/17
Which of the following is not a valid description of what a probability is?
A. Quantified plausibility B. A number between 0 and 100 C. Relative frequency D. Degree of belief E. A number between 0 and 1
Probability & Statistics
09/21/17
Probability
a bag contains 5 red and 3 blue discs. A disc is chosen at random and then replaced. this is repeated 200 times, How many times would you expect a red disc to be chosen?
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09/20/17
Probability
an urn contains 10 white, 18 red, and 8 blue chips. two chips are drawn without replacement. find the probability of:
first chip red, second chip blue
a red and a blue chip
first chip not...
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09/18/17
Probability problem
a die is rolled find the probability of:
an even number
a number divisible by 3
not a two nor a six
not an ace
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Probability & Statistics
09/13/17
probability
The probability that a student passes course A is .6. The probability that he passes course B is .3. The probability that he passes either A or B or both is .8. What is the probability that he...
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Probability & Statistics
09/13/17
probability problem
an urn contains tags with numbers 1 to 25. one tag is picked t random. find the probabilities of the occurrence of the following events:
odd number
number 18
number divisible by 3
a prime...
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Probability & Statistics
09/13/17
assume all sample points equally likely to occur
four coins are tossed. List the sample space and find the probabilities of the occurrence of the following events:
A: exactly 3 heads
B: Second coin heads
C: more heads then tails
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09/12/17
The probability that the number of successes is exactly 0
assume that a procedure yields a binomial distribmutinous with 3 trials and a probability of success of 0.10. Use a binomial table to find the probability that the number of successes is exactly...
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Probability & Statistics
09/06/17
A fair coin is flipped 9 times. What is the probability of getting exactly 6 heads?
Having difficulty understanding how to answer this question
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Probability & Statistics
08/27/17
Experience has shown that 60% of the time a strike by union workers is settled within two-weeks
Experience has shown that 60% of the time a strike by union workers is settled within two-weeks; 55% of the time the union strike fund is adequate to support a strike; and 40% of the time both...
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Probability & Statistics
08/17/17
what is the probability of drawing a face card in a deck
what is the probability of drawing a face card in a deck of cards
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Probability & Statistics
08/17/17
Probability exam question
A biased coin has a probability of heads P(H)=p and tails P(T)=1-P what is the probability that up to and including the nth toss at least one head has occurred?
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