5,395 Answered Questions for the topic probability

Probability Finite Math

07/19/20

Finite Math: Probability
Wonder Widgets Inc. has 3 plants producing their De-lux Wonder Widget (DWW). Plant A produces 80% of all DWW, plant B 15%, and plant C the remaining 5%. 7% of Plant A’s production is defective, 6%... more
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Probability Finite Math

07/19/20

Finite Math: Probability
Assume that 37% of the voting population in the US considers themselves as Democrats. Ten of these voters are selected at random(a) What is the probability that exactly 3 of the 10 selected... more
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Probability Finite Math

07/19/20

Probability: Independent Events
Let A and B be independent events with P(A) = .4 and P(B) = .2. Find P(A ∪ B).
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Probability Finite Math

07/19/20

Probability: Combinations
A club consists of 15 women and 10 men. They need to form a committee of 5 people. (a) How many different committees can be formed? (b) How many different committees consisting of 3 women and 2 men... more
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07/18/20

Probability of a cubic having three real roots.
third degree polynomial is given as follows. f(x)=2x3-ax2+bx+4 a, b coefficients of the equation a,b interval between [-4,4]. what is the probability that all three roots of this equation are real... more
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Probability Math Statistics

07/18/20

Probability & Statistics
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Probability

07/17/20

The probability that a baby boy born by a certain couple will grow up to be tall is 1/ 4. The probability of the couple to get a tall daughter is

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Probability Statistics

07/17/20

HELP!!! I need help with statistics!

Help!!! With a SD of 16 a mean of 84 what would the probability be that someone scored an 80 on a test? Z score is -0.25. Also, with a Z score of 0.375, what would the probability be for someone to... more
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Probability Statistics Economics

07/17/20

If you draw a card with a value of four or less from a standard deck of cards, I will pay you $7. If not, you pay me $6. (Aces are considered the highest card in the deck.)
Step 1 of 2 :  Find the expected value of the proposition. Round your answer to two decimal places. Losses must be expressed as negative values.
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Probability Finite Math

07/16/20

Finite Math: Probability
A lot of 250 light bulbs contains 20 defective bulbs and 230 good bulbs. A sample of 4 different light bulbs is selected at random.(a) What is the probability that all 4 bulbs selected are good?(b)... more
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Probability Finite Math

07/16/20

Finite Math: Probability
A container has 7 red marbles, 3 white marbles, and 5 blue marbles. A marble is selected at random from these 15 marbles, its color is noted and it is replaced. A second marble is selected from the... more
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Probability Finite Math

07/16/20

Finite Math: Probability & Independence
Last year in Way-up-there Alaska voted for mayor with the following results: Democrat Republican Bull-Moose Party Male 12 22 21 Female 24 13 33 One of these voters is selected at random.(a)... more
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Probability Finite Math

07/16/20

Finite Math: Probability
The House of Representatives consists of 435 members. They considered two bills. 325 members voted yes on bill A. 250 members voted yes on bill B. 170 members voted yes on both bills.(a) How many... more
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Probability Finite Math

07/16/20

Finite Math: Probability
A container has nine marbles numbered 1, 2, 3, 4, 5, 6, 7, 8, 9. Two different marbles are selected at random from this container.(a) What is the probability that one of the marbles selected was... more
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Probability Math Statistics

07/14/20

Sampling distribution

Suppose our population consists of the values (2, 3, 5, 7, 11, 13, 17), that is, our population is the first 7 prime numbers (one of each).a) If we take a simple random sample of size k, where k is... more
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Probability Discrete Math

07/14/20

What is the probability that a student picked at random took Precalculus, given that she passed Calculus?

A college requires certain students to take Precalculus prior to taking Calculus. Thirty-five percent of students that eventually take Calculus take the Precalculus course. Sixty percent of those... more
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Probability Discrete Math

07/13/20

What is the probability that all three are queens?
Three cards are drawn in succession from a standard 52 card playing deck without replacement. What is the probability that all three are queens?
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Probability Discrete Math

07/13/20

what is the probability that the applicant speaks French or German?
Of 78 job applicants to the United Nations, 31 speak French, 41 speak German and 9 speak French and German. If a job applicant is chosen at random, what is the probability that the applicant speaks... more
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Probability Expected Value

07/13/20

an individual purchase dozen of eggs. there is a 50% chance that all the eggs carried on any one trip will be broken during the trip. The individual consider two strategies:
strategy 1: take 12 eggs in one tripstrategy 2: take two trips with 6 eggs in each tripWhat is the expected value in each two cases?
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Probability Statistics Finite Math

07/13/20

Finite Math: Probability & Percentages
Wonder Widgets Inc produces  Midget Widgets (MW).. Their data shows that 2% of the output is defective. A sample of 25 MWs is taken.(a) What is the probability that exactly two of this sample are... more
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Probability Statistics Finite Math

07/13/20

Finite Math: Finding Probability & Percentages
Wonder Widgets Inc. has three factories producing the Wham Wonder Widget (WWW). Last year, factory A produced 60 % of all WWW, factory B produced 30% of all WWW, and factory C produced the... more
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Probability Math Statistics

07/09/20

Breaking a stick into 3 pieces
Assume that you are breaking a stick into 3 pieces by uniformly and independently selecting two break points 𝑋 and 𝑌. If we denote the event that these pieces form a triangle by T and lengths of... more
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07/09/20

Biostatistics/ Probability
Suppose that it is known that a fraction 0.001 of the people in a town have tuberculosis (TB). A TB test is available. The sensitivity of a given test is the probability of correctly diagnosing a... more
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Probability Math Statistics

07/09/20

Confidence interval for population proportion
Is it possible that a confidence interval for population proportion will contain values less than 0 or greater than 1.If yes, please provide an example.If no, please explain why.
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Probability

07/08/20

Standard deviation of return on investment average probability

in current year companies have an average return on investment of 12.8% and standard deviation of return is 3.2%. Average return is normally distributed. What is the probability that a random... more
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