At Least One Probability

What is "p" in the equation?

• Probability of success on a single trial

• Probability of failure on a single trial

• Binomial Probability (final answer)

How do you set up equation for this one? 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 of getting exactly 2 of the first 10 blood donors has Type B blood? 

• (a)

• (b)

• (c)

How do you set up equation for this one? An algebra 2 test has 6 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 6 questions, what is the probability that you get exactly 3 questions correct?

• (a)

• (b)

• (c)

How do you set up equation for this one? An algebra 2 test has 5 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 5 questions, what is the probability that you get at least 1 question correct?

• (a)

• (b)

• (c)

• (d)

How do you set up equation for this one? A survey found that 25% of pet owners had their pets bathed professionally rather than do it themselves. If 18 pet owners are randomly selected, find the probability that exactly 5 people have their pets bathed professionally.

• (a)

• (b)

• (c)

• (d)

Which formula would you use in the following case?. A coin is tossed 5 times. What is the probability getting at least 1 heads?

• (a)

• (b)

What is "p" in the following scenario? An algebra 2 test has 6 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 6 questions, what is the probability that you get exactly 3 questions correct?

• 1/2

• 1/6

• 1/3

• 1/4

What is "p" in the following scenario?

If you were to flip a coin 20 times, what is the probability you would get exactly 7 heads?

• 1/2

• 10

• 20

• 7/20

What is "p" in the following scenario?

A quarterback has a incomplete passing percentage of 30%. What is the probability that he does not complete exactly 8 of his 20 passes?

• 8/20

• 30

• 0.3

• 0.03

What is "p" in the following scenario? 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?

• 11

• 0.11

• 2/10

• 2