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Assume that there are 21 homes in the Quail Creek area and four of them have a security system. Three homes are selected at random:

a. What is the probability all three of the selected homes have a security system? (Round the finalanswer to 4 decimal places.)

Probability

b. What is the probability none of the three selected homes has a security system? (Round the final answer to 4 decimal places.)

Probability

c. What is the probability at least one of the selected homes has a security system? (Round the final answer to 4 decimal places.)

Probability

d. Did you assume the events to be dependent or independent?

(Click to select) Dependent Joint Independent

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