2,525 Answered Questions for the topic probability

18h

#### Complement and Independent events.

Show that if A and B are independent events, then the pairs A and B', A' and B, A' and B' are also independent.How do I prove it?

1d

#### What is the Probablility?

Does it pay to ask for a raise? A national survey of heads of households showed the percentage of those who asked for a raise and the percentage who got one. According to the survey, of the men...
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1d

#### Marbles probability question

6 marbles, 3 of which is defective.Upon inspection on defective marble, 80% chance to successfully confirm indeed defective.However, inspection made on good marble has a 5% chance of wrongly...
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2d

#### EXPECTED VALUE GAMBLING WHEEL QUESTION

Suppose you bet $1 on red at the roulette wheel. There are 18 red numbers and 20 nonred numbers (including the green 0 and 00). You win $1 if a red number comes up, and you lose $1 if any other...
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2d

#### Find the probability

There are 25 red marbles, 15 green marbles, and 10 blue marbles.You randomly pick 4 from the bag.What is the probability of picking at least 1 marble of each color?

3d

#### What is the probability that the subcommittee consists of 2 men and 1 woman, given that it contains both men and women?

For this problem, assume that the committee contains 10 men and 8 women and that three are selected at random for a subcommittee.

3d

#### Probability Mass Function

Cards are selected at random and with replacement from an ordinary deck of 52 cards. Define the random variable X as the number of trials until we obtain the first ace. Give the probability mass...
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6d

#### probability distribution

suppose that one each of 5 races the democrats have a 60% chance of winning. assuming the races are independent of each other, let x be the number of races democrats win.a) find the probability...
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6d

#### Finite Homework Help, Conditional Probability

A and B are a subset of S, Pr[A|B]=4/9, Pr[A]=9/20, Pr[B']=11/20, what is Pr[B|A']?

6d

#### Unit 11 Test Probability & Statistics

The odds of winning a game at the carnival are 3 in 7. If Liza plays the game nine times, what is the probability that she wins exactly two times?

10d

#### A committee of three people is selected at random from a set consisting of seven teachers, three parents of students, and eight alumni.

What is the probability of the event that there will be at least 1 teacher on the committee?

11d

#### Standard Deviation

Approximately what percent of a standard normal distribution is found within each region? Hint: Drawing a graph may help.Note: Please enter your answers in percentages.a. Between the mean and one...
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11d

#### Find P(B ^C) and investigate whether events B and C are mutually exclusive

P(A)= 1/3 P(A^B)= 1/12 P(C)= 1/2 P(B U C)= 5/8A and B are independent events

11d

#### Advanced Placement Statistics

Cassandra's Cogs states in its advertisement that 90% of its orders are ready to ship within three working days. A simple random sample of 100 of the 2,500 orders received during the past month are...
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12d

#### Probability Without Replacement

Bruno has 90 marbles. Of those, 45 are broken and 75 are painted red. If he randomly picks marbles one at a time, what is the probability that the first marble he gets is painted red, the second...
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13d

#### Probability Distributions

In a box of smarties there are eight different colours which normally occur in equal proportions. Rachael is given 24 smarties, and orange ones are her favourite. Assume they come from a very large...
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18d

#### Probability of choosing a candy

A jar contains 2 caramels, 7 mints and 16 dark chocolates. What is the probability of choosing a dark chocolate, eating it, then choosing a caramel?

19d

#### What is the probability of a random test occuring on any of the first 5 days of a 31 day month?

Hypothetically, if you know that you will be given a test on any random day in March, but you also know you will no longer be in that class after March 5th, what is the probability that you WILL...
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23d

#### In a school, 70% of the students are female. 10 students were randomly selected.

In a school, 70% of the students are female. 10 students were randomly selected. What is the probability that?1. Five female students are selected2. At least are one female student is selected3....
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