What type of systems contain redundant hardware, software,...

What type of systems contain redundant hardware, software, and power supply components to create an environment that provides continuous, uninterrupted service? A. Safety Power Environment Systems (SPES) B. R.H.SPS C. UPS D. This is new technology that is not in service yet. E. Fault-tolerant computer systems

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00:01 The question is regarding the redundancy principle of redundancy.

00:07 So from here, you can see the student alarm clock has a 17 .3 % daily failure rate, complete a to d.

00:15 Question a asked about what the probability of the student that alarm clock will not work on the morning of an important final exam.

00:25 Since the failure rate is 17 .3%.

00:32 This failure means the alarm clock not work.

00:37 So this means that the first answer is going to be 0 .173.

00:41 So a single clock has a failure rate of 17 .3 or 0 .173.

00:47 It has 0 .173 chance that it's not going to work on that morning.

00:55 B, if the student has two such clock, what would be the probability when they both fail on the morning, then around to five decimal? so now, p both, it's going to be single, 0 .173, and then multiply by another one.

01:16 It's also 0 .173.

01:18 So now round to 5 decimal is 0 .02.

01:28 So from here you can see you lower the chance from 0 .173 to 0 .02 -2 -2993.

01:37 Because you have two events, they occur at the same time.

01:41 You're going to use multiplication.

01:42 This lower the chance dramatically by using redundancy.

01:48 C asked about what is the probability of not being weak if the student use three independent clock...

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