The lifetime of a lightbulb can be modeled with an exponential random variable with an expected lifetime of 700 days. (a) Find the probability that the lightbulb will function for more than 1400 days. (b) Find the probability that the lightbulb will function for more than 1400 days, given that it is still functional after 500 days.

The lifetime of a lightbulb can be modeled with an exponential random variable with an expected lifetime of 700 days. (a) Find the probability that the lightbulb will function for more than 1400 days. (b) Find the probability that the lightbulb will function for more than 1400 days, given that it is still functional after 500 days.

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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