mathxl.com Do k Cori Glaude MAT 2323 ONLINE Fall 2017 Cori Glaude 9/28/17 304 PM
ID: 3306031 • Letter: M
Question
mathxl.com Do k Cori Glaude MAT 2323 ONLINE Fall 2017 Cori Glaude 9/28/17 304 PM Homework: Section 4-5 Score: 0 of 2 pts 4.5.29 Hw Score: 40%, 2 of 5 pts Assume that there is a 7% rate of disk drive failure in a year. a. If all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probablty that during a year you can avoid catastrophe with at least one working drive? b. If copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with a least one working drive? a. With two hard disk drives, the probability that catastrophe can be avoided is Round to four decimal places as needed.)Explanation / Answer
Rate of disc drive faliure is 7% = 0.07
a. P(atleast 1 worling drive out of 2)= 1-P(both drives fail ) = 1- [0.07*0.07] = 0.9951
b. P(atleast 1 worling drive out of 4)= 1-P(all 4 drives fail ) = 1- [0.07*0.07*0.07*0.07] = 0.9999
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.