# Question

Refer to Exercise 62, but assume there are 10 homes in the Quail Creek area and 4 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?

b. What is the probability none of the three selected homes has a security system?

c. What is the probability at least one of the selected homes has a security system?

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

a. What is the probability all three of the selected homes have a security system?

b. What is the probability none of the three selected homes has a security system?

c. What is the probability at least one of the selected homes has a security system?

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

## Answer to relevant Questions

There are 20 families living in the Willbrook Farms Development. Of these families, 10 pre-pared their own federal income taxes for last year, 7 had their taxes prepared by a local professional, and the remaining 3 by H&R ...An investor purchased 100 shares of Fifth Third Bank stock and 100 shares of Santee Electric Cooperative stock. The probability the bank stock will appreciate over a year is .70. The probability the electric utility will ...ABC Auto Insurance classifies drivers as good, medium, or poor risks. Drivers who apply to them for insurance fall into these three groups in the proportions 30%, 50%, and 20%, respectively. The probability a “good” ...A study of 200 advertising firms revealed their income after taxes:Income after Taxes Number of FirmsUnder $1 million ......... 102$1 million to $20 million....... 61$20 million or more......... 37 a. What is the ...Which of these variables are discrete and which are continuous random variables?a. The number of new accounts established by a salesperson in a year.b. The time between customer arrivals to a bank ATM.c. The number of ...Post your question

0