In Questions 2-4 suppose there are a total of 15 Carbon Monoxide Detectors in a building...
In Questions 2-4 suppose there are a total of 15 Carbon Monoxide Detectors in a building and event “Y” is defined as Y={At least 9 of these detectors work}. Further suppose P(each detector work)=0.8, and detectors are independent of each other. Which of the following is the Ybar (complement of Y)?
- A. Ybar={At least 5 detectors fail}
- B. Ybar={At least 6 detectors fail}
- C. Ybar={At most 6 detectors fail}
- D. Ybar={At least 7 detectors fail}
- E. Ybar={At most 7 detectors fail}
Homework Answers
Ybar
= Complement of Y
= Less than 9 of these detectors work
= Atmost 8 of these detectors work
= Atleast 7 detectors fail
Option D is correct.
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