At Least Probabilities

At Least Probabilities

12th Grade

13 Qs

quiz-placeholder

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At Least Probabilities

At Least Probabilities

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Hard

Created by

Anthony Clark

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13 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Find the mean (expected value) of the probability distribution.

85

83.2

87.1

84.4

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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 at least 2 of the first 10 blood donors has Type B blood? 

0.088

0.697

0.214

0.303 

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If a fair coin is tossed 200 times, what is the probability that at least 99 but less than 110 heads turn up?

0.4945

0.4387

0.5153

0.4595

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If you were to flip a coin 20 times, what is the probability you would get at least 13 heads?

94.23%

13.16%

5.77%

7.39%

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Given the probability model in the table below, what is the expected value of the random variable?
  X        50          20        5
P(X)     0.1         0.3      0.6

14

4.67

5

7.5

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What does the p stand for in the binomial probability formula?

Number of trials

Number of Successes

Probability of Successes

Probability of Failures

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The following table presents a probability distribution for the number of pets each family has in a certain neighborhood. Find the probability that a randomly selected family has 1 or 2 pets.

0.2

0.4

0.1

0.5

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