5,395 Answered Questions for the topic probability

Probability Statistics

08/04/21

Can a Random Variable be a Sample or just a Single Value?
In my introductory statistics course, I've seen statements like 'Y1 . . . , Yn is a simple random sample without replacement, of size n, from the population.' and that the CLT applies if 'Y1, . . .... more
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Probability Math

08/04/21

Probability question
A factory produces solar batteries. The probability of a new battery being defective is 3%. However, if the manager is on duty, the probability of a new battery being defective changes to 2%. The... more
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Probability Math Statistics

08/02/21

How can I calculate this? A box which contains five white balls, and three blue balls from where four balls were selected which were chosen.

Determine:a. the probability of receiving two white balls.b. the probability of receiving at most a white ball.c. the probability of receiving at least two blue balls.
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Probability

08/02/21

Probabilty Please help and explain in detail how you came to the answer
According to Statistics Norway, there are a total of 1,079,641 mothers among Norwegian women born 1935-1991. Among these, 860209 have at least two children, 368 445 have at least three children,... more
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Probability

07/31/21

Calculation of joint probability distribution function

Question: (Two Functions of two RVs, Z = g(X,Y), W = h(X,Y)) Let X and Y be two exponentially distributed independent Random Variables with the same parameter (λ). Let Z = X + DY = g(X, Y), and W =... more
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Probability Statistics

07/30/21

Probability question Im stumped
 A company has invested $100,000 in a plant which should meet all foreseeable demand for a patented product. The annual demand is normally distributed with a mean of of 20,000 units and a standard... more
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07/29/21

Ina box contain 21 marbles: 6 white, 7 black, and 8 yellow. Randomly pick out one marble and return it back to the box for 8 times. What is the possibility to get exact 4 white and 3 black marbles?

The answer has four decimal place.
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Probability Statistics

07/28/21

What is the probability?
A life insurance salesman finds that, of all the sales he makes, 70% are to people who already own policies. He also finds that, of all contacts for which no sale is made, 50% already own life... more
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Probability Statistics

07/28/21

What are the events?
A dean has found that 62% of entering freshmen and 78% of community college transfers eventually graduate. Of all entering students, 73% are entering freshmen and the remainder are community... more
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Probability College Algebra

07/27/21

Probabillity Question

Two people are selected at random from eleven men and ten women. Find the probability that the first is a woman and the second is a man.
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Probability Statistics

07/27/21

Probabibility and combinatorics
Of 100 patients with a certain disease, 10 were chosen at random to undergo a drug treatment that increases the cure rate from 50% for those not given the treatment to 75% for those given the drug... more
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Probability Statistics

07/27/21

Probability of an event
A jury of 12 members is to be selected from a panel consisting of 8 men and 8 women. a. How many different jury selections are possible?b. If the choice is made randomly, what is the probability... more
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Probability Math

07/27/21

Matthew flips 2 coins, what is the probability that he will get
a.  only one tail.                                                                      b.  two heads.
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Probability Math

07/27/21

There are six cards and each card shows one of the letters in the word C A N A D A. If you choose randomly, what is the probability of choosing a card with the letter A?

There are six cards and each card shows one of the letters in the word  C A N A D A. If you choose randomly, what is the probability of choosing a card with the letter A? 
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Probability Math

07/26/21

What is the probability of tossing a coin 5 times and each time getting heads
What is the probability of tossing a coin 5 times and each time getting heads
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Probability Math

07/26/21

What is the probability of drawing a black face card in a standard deck of 52 playing cards?

what is the probability of drawing a black face card in a standard deck of 52 playing cards? 
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Probability Math

07/26/21

A ten sided die is numbered from one to ten. What is the probability of rolling a four on 3 consecutive rolls
A ten sided die is numbered from one to ten. What is the probability of rolling a four on 3 consecutive rolls
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Probability Math

07/26/21

The letters that make the name BRIANNA are put on cards and placed in a box. State the probability of each event below if one letter is selected at random from the word BRIANNA
an “N”  a vowel  an “R” 
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Probability Percentage

07/25/21

Failure of drugs during development is due to many reasons, such as Poor biopharmaceutical properties =40%, Lack of efficacy =30% and Toxicity =45%. So what is the percentage of drugs that fail
Failure of drugs during development is due to many reasons, such as Poor biopharmaceutical properties =40%, Lack of efficacy =30% and Toxicity =45%. So what is the percentage of drugs that fail
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Probability Math Sat

07/22/21

9 students have to form a line. In how many different ways can they be arranged?
__?__ arrangements
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Probability Math Calculus

07/22/21

How many different numbers are possible?
A personal identification number consists of 3 letters followed by 3 digits. The letters X,Y, and Z are not used and the last digit cannot be 0 or 9.__?__ different numbers
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Probability Precalculus

07/22/21

What is the probability that all three prizes go to women?
Party guests are each given a number at the door when they come in and during the party 3 numbers will be chosen at random from a hat to win door prizes. There are 20 people at the party of which... more
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Probability

07/20/21

find the odds in favor of rolling the sum of 6 when rolling a pair of dice
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Probability

07/20/21

find the probability of selecting two red cards when two cards are drawn without replacement from a standard deck of cards
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Probability

07/20/21

200 people apply for 3 jobs. 60 are women. If 3 persons are selected randomly, what is probability 2 are women

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