Which tablet has better Availability?

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Question 20
 
We want to compare the quality of three Tablet products:  Tablet Product A has a Mean Time Between Failures (MTBF) 10,000 hours, and a Mean Time To Repair (MTTR) or 10 hours.  Product B has a MTBF of 11,000 hours and a MTTR of 11 hours.  Product C has a MTBF of 12,000 hours and MTTR of 12 hours.   Which tablet has better Availability?
 
Group of answer choices
a. Tablet A
b. Tablet B
c. Tablet C
d. The Availability of Tablets A, B and C are equal
e. Impossible to determine
Expert Solution
Step 1

Availability indicating the proportion between system running time and downtime. It identifying the availability using the standard equation using MTBF and MTTR. The highest number indicating option will be the greatest available item. The calculation will be like given below. 

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