Question

9. An agent sells life insurance policies to five equally aged, healthy people. According to recent data, the probability of a person living in these conditions for 30 years or more is 2/3. Calculate the probability that after 30 years: a) All five people are still living. b) At least three people are still living. c) Exactly two people are still living. 10. A pharmaceutical lab states that a drug causes negative side effects in 3 of every 100 patients. To confirm this affirmation, another laboratory chooses 5 people at random who have consumed the drug. What is the probability of the following events? a) None of the five patients experience side effects. a) At least two experience side effects. b) What is the average number of patients that the laboratory should expect to experience side effects if they choose 100 patients at random? 11. From 6 people, a committee of 3 is to be formed. In how many ways can this be done? 12. There are 20 books on the top shelf of a bookcase. If you choose 8 of them to line up on the second shelf, how many different ways are there to line them up if order is unimportant? 13. Choose 22 letters from the alphabet without repeating a letter. How many different combinations can you make if the order is unimportant?

          9. An agent sells life insurance policies to five equally aged, healthy people. According to recent
data, the probability of a person living in these conditions for 30 years or more is 2/3.
Calculate the probability that after 30 years:
a) All five people are still living.
b) At least three people are still living.
c) Exactly two people are still living.
10. A pharmaceutical lab states that a drug causes negative side effects in 3 of every 100
patients. To confirm this affirmation, another laboratory chooses 5 people at random who
have consumed the drug. What is the probability of the following events?
a) None of the five patients experience side effects.
a) At least two experience side effects.
b) What is the average number of patients that the laboratory should expect to experience
side effects if they choose 100 patients at random?
11. From 6 people, a committee of 3 is to be formed. In how many ways can this be done?
12. There are 20 books on the top shelf of a bookcase. If you choose 8 of them to line up on the
second shelf, how many different ways are there to line them up if order is unimportant?
13. Choose 22 letters from the alphabet without repeating a letter. How many different
combinations can you make if the order is unimportant?

9. An agent sells life insurance policies to five equally aged, healthy people. According to recent
data, the probability of a person living in these conditions for 30 years or more is 2/3.
Calculate the probability that after 30 years:
a) All five people are still living.
b) At least three people are still living.
c) Exactly two people are still living.
10. A pharmaceutical lab states that a drug causes negative side effects in 3 of every 100
patients. To confirm this affirmation, another laboratory chooses 5 people at random who
have consumed the drug. What is the probability of the following events?
a) None of the five patients experience side effects.
a) At least two experience side effects.
b) What is the average number of patients that the laboratory should expect to experience
side effects if they choose 100 patients at random?
11. From 6 people, a committee of 3 is to be formed. In how many ways can this be done?
12. There are 20 books on the top shelf of a bookcase. If you choose 8 of them to line up on the
second shelf, how many different ways are there to line them up if order is unimportant?
13. Choose 22 letters from the alphabet without repeating a letter. How many different
combinations can you make if the order is unimportant?

Added by Susan F.

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