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in a test on 200 electric bulbs , it was found that life particular make,was normally distributed with an average life of 2040 hours standard deviation of hours estimate the number of bulbs likely to burn for i) more than 2140hrs ii)between 1920 and 2080 hours iii)less than 1960 hours


pk566935 10th May, 2020
Answer (1)
Utkarsh Bajpai 9th Jun, 2020

Hello Aspirant!

I am providing you with the link that will help you in getting detailed solution of the question you asked. Feel free to reach me out for any other query  by simply replying to this comment.

https://hemantmore.org.in/mathematics/statistics/normally-distributed/14360/

Hope that helps!

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