On average , a certain computer part lasts 10 years. the length of time the computer part lasts is exponentially distributed i) What is the probability that a computer part lasts more than 7  years ii) on average, how long would 5 computer parts last if they are used one after another iii) Eighty percent of computer parts last at most how long ?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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On average , a certain computer part lasts 10 years. the length of time the computer part lasts is exponentially distributed
i) What is the probability that a computer part lasts more than 7  years
ii) on average, how long would 5 computer parts last if they are used one after another
iii) Eighty percent of computer parts last at most how long ?

iv)  What is the probabilityv that a computer part lasts between 9 and 11 years

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