1. The American Red Cross says that about 11% of the U.S. population

has Type B blood. A blood drive is being held at your school.What is the probability thatexactly 2of the first 20 blood donors have Type B blood?

answer choices

A.0.316

B. 0.282

C. 0.001

D. Not here

2.

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.What is the probability that atleast 2of the first 10 blood donors has Type B blood?

answer choices

A. 0.088

B.0.697

C. 0.214

D. 0.303

3.

Which of the following isfalseabout binomial probabilities?

answer choices

1. Their distributions are approximately symmetric.
2. Trials must be fixed.
3. Events musts be independent.
4. The probability of success must be 0.50

4.

When rolling a fair die 100 times, what is the probability of rolling a "4"exactly25 times?

answer choices

A. 0.010

B. 0.167

C. 0.25

D. 0.021

5.

Which one of these variables is acontinuousrandom variable?

answer choices

1. The time it takes a randomly selected student to complete an exam.
2. The number of tattoos a randomly selected person has.
3. The number of women taller than 68 inches in a random sample of 5 women.
4. The number of correct guesses on a multiple choice test.

6

When rolling two dice, the probability of rolling doubles is. Suppose that a game player rolls the dice five times, hoping to roll doubles. What is the probability the player gets doubles less than three times in 5 attempts?

answer choices

A. 0.161

B. 0.965

C. 0.015

D. 0.997

• 7.

In a traffic light consisting of red, yellow and green. What is the probability of getting 2 reds?

• A.

0.343

• B.

0.189

• C.

0.441

• D.

8.

Classify: The numbers of cheeseburgers a fast-food restaurant serves each day

answer choices

1. None of these
2. Abstract
3. Continuous
4. Discrete

9. Multiple-choice

If you flip one coin and then roll a die, how many possible outcomes can you get?

answer choices

1. 6
2. 12
3. 7
4. 0