8. The probability density function of X , the lifetime of a certain type of electronic device(measured in hours) is(10x > 10given by f (x) = {x2x< 10а.Find P(X > 20)b. What is the cumulative distribution function of X?С.What is the probability that, of 6 such types of devices, at least 3 will function for at least 15 hours? Whatassumptions are you making?

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Answered: E, x> 10 (0, х< 10 given by f (x) = a.…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

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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E, x> 10 (0, х< 10 given by f (x) = a. Find P(X > 20) b. What is the cumulative distribution function of X? c. What is the probability that, of 6 such types of devices, at least 3 will function for at least 15 hours? What assumptions are you making?