17. A manufacturing firm produces LED lamps with a mean lifetime of 900 hrs and standard deviation of 55 hrs. Find the probability that a random sample of 100 lamps will last on the average of more than 915 hrs. (Express your answer in 6 decimal places)

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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17. A manufacturing firm produces LED lamps with a mean lifetime of 900 hrs and standard deviation of 55 hrs. Find the probability that a random sample of 100 lamps will last on the average of more than 915 hrs. (Express your answer in 6 decimal places)

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