pose that a light fixture has 100 light bulbs installed. The lifetimes of light bulbs are independent exponential random variables with a common mean equal to 800 hours. Because replacing a light bulb involves someone climbing up the fixture, the owner decides not to replace bulbs until 5 light bulbs have burned out. If currently all the 100 light bulbs are working, find the expected time until the needs to replace the bulbs.
pose that a light fixture has 100 light bulbs installed. The lifetimes of light bulbs are independent exponential random variables with a common mean equal to 800 hours. Because replacing a light bulb involves someone climbing up the fixture, the owner decides not to replace bulbs until 5 light bulbs have burned out. If currently all the 100 light bulbs are working, find the expected time until the needs to replace the bulbs.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 26PPS
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Suppose that a light fixture has 100 light bulbs installed. The lifetimes of light bulbs are independent exponential random variables with a common mean equal to 800 hours. Because replacing a light bulb involves someone climbing up the fixture, the owner decides not to replace bulbs until 5 light bulbs have burned out. If currently all the 100 light bulbs are working, find the expected time until the needs to replace the bulbs.
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