A LED display board is made up of 20,000 LEDS. The lifetimes of LEDS are normally distributed with a mean of 7 years and a standard deviation of 1 year. 9. Find the number of LEDS with lifetimes between 5 and 9 years. 10. The display board will be replaced if 2.5% or more of the LEDS breakdown. Estimate the time the display board will be in service before it has to be replaced.

A LED display board is made up of 20,000 LEDS. The lifetimes of LEDS are normally distributed with a mean of 7 years and a standard deviation of 1 year. 9. Find the number of LEDS with lifetimes between 5 and 9 years. 10. The display board will be replaced if 2.5% or more of the LEDS breakdown. Estimate the time the display board will be in service before it has to be replaced.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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