Contents

- 1 What is the probability that a randomly selected freshman has English as the first class of the day?
- 2 What is the probability that a randomly selected person who tested positive for the flu?
- 3 What is the probability that a randomly selected reference book is hardcover?
- 4 What is the probability that he pulls out a 3 first and then pulls out a 2 without replacing them?
- 5 What is the probability that a randomly?
- 6 What is the probability that a person who tests positive actually has the disease?
- 7 What is the probability that an individual has the disease if the test is negative?
- 8 How do you calculate conditional probability?
- 9 What is the probability that a randomly selected car with no 4 wheel drive has third row seats?
- 10 Which statement is true about whether A and B are independent events?
- 11 What does without replacement mean in probability?
- 12 What is the probability of an event that must happen?
- 13 How do you find the probability of A or B if they are independent?

## What is the probability that a randomly selected freshman has English as the first class of the day?

What is the probability that a randomly selected freshman has English as the first class of the day? 59/212

## What is the probability that a randomly selected person who tested positive for the flu?

0.5% of a population are infected with a dangerous virus. A diagnostic test for the identification of the virus is positive in 99% for infected people and in 2% for not infected people.

## What is the probability that a randomly selected reference book is hardcover?

Let A denote the event that the selected book is is a reference one and B denote the event that the selected book is a hardcover. So, Therefore, the probability that a randomly selected reference book is hardcover is equal to the conditional probability of event B given A.

## What is the probability that he pulls out a 3 first and then pulls out a 2 without replacing them?

Hiro has a stack of cards with one number from the set 1, 1, 2, 2, 3, 3, 3, 4 written on each card. What is the probability that he pulls out a 3 first and then pulls out a 2 without replacing them? 1/64.

## What is the probability that a randomly?

For example, if you were to pick 3 items at random, multiply 0.76 by itself 3 times: 0.76 x 0.76 x 0.76 =. 4389 (rounded to 4 decimal places). That’s how to find the probability of a random event!

## What is the probability that a person who tests positive actually has the disease?

A certain disease has an incidence rate of 2%. If the false negative rate is 10% and the false positive rate is 1%, compute the probability that a person who tests positive actually has the disease. so about 65% of the people who test positive will have the disease.

## What is the probability that an individual has the disease if the test is negative?

the probability that the test result is negative (suggesting the person does not have the disease ), given that the person has the disease, is only 1 percent.

## How do you calculate conditional probability?

The formula for conditional probability is derived from the probability multiplication rule, P(A and B) = P(A)*P(B|A). You may also see this rule as P(A∪B).

## What is the probability that a randomly selected car with no 4 wheel drive has third row seats?

The two-way table shows the number of sport utility vehicles with certain features for sale at the car lot. What is the probability that a randomly selected car with no 4 – wheel drive has third row seats? 0.3.

## Which statement is true about whether A and B are independent events?

In the case where events A and B are independent the conditional probability of event B given event A is simply the probability of event B, that is P( B ). Statement 1:A and B are independent events because P(A∣ B ) = P(A) = 0.12. This is true.

## What does without replacement mean in probability?

Without replacement: When sampling is done without replacement, each member of a population may be chosen only once. In this case, the probabilities for the second pick are affected by the result of the first pick. The events are considered to be dependent or not independent.

## What is the probability of an event that must happen?

An event with a probability of one [P(E) = 1] means the event must occur (a certain event ). An event with a probability of 0.5 [P(E) = 0.5] is sometimes called a fifty-fifty chance event or an even chance event. An event with a higher probability is more likely to occur than one with a lower probability.

## How do you find the probability of A or B if they are independent?

Formula for the probability of A and B ( independent events): p(A and B ) = p(A) * p( B ). If the probability of one event doesn’t affect the other, you have an independent event. All you do is multiply the probability of one by the probability of another.