# A computer hardware has a yearly 83% rate of success.?

What is the probability that if you buy four computers, all four computer hardwares will remain successful within a year?

### 4 Answers

- STEVEN FLv 71 month ago
About 10,000 times the probability you will learn ANYTHING in your statistics class if you have to ask Yahoo Answers EVERY question in your homework.

- StephenWeinsteinLv 71 month ago
Only slightly more than 83%, and much less than the answer that whoever wrote this question thought was the answer. They're not independent events. Even though probability theory would indicate only a .17^4 chance that they'd all fail, it's actually much more likely, because it could turn out to be badly designed hardware, or they could all be destroyed by a fire or power surge.

The way to get the answer that would be marked correct is simple -- raise .83 to the 4th power.

But that's really the wrong answer in practice.

Even if they are not independent, your answer is still BACKWARDS.