1000 Light Bulbs

by Subodh
(India)

1000 light bulbs with a mean life of 120 days are installed in a new factory and their length of life is normally distributed with a standard deviation of

30 days.

I need the answer & how to solve it.

Thanks'
&
regards

Comments for 1000 Light Bulbs

Average Rating starstarstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar
ANSWER
by: MATHS LEARNER`

1000 light bulbs with a mean life of 120 days are installed in a new factory and their length of life
is normally distributed with a standard deviation of 30 days
ANS : TAKE X PWR 1 =1000
MEU = 120
SD = 30

Z=120-1000/20

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to views.

Solo Build It!

Recent Articles

  1. An SBI Review by 13 years user

    May 30, 17 03:28 PM

    Why SBI can help any average person like me to develop a successful online business

    Read More

  2. Warning: Quit All Your Efforts to Increase Your IQ Score

    May 16, 17 04:33 PM

    I have tested High IQ Pro. Is it a Scam? An Honest Review of the software.

    Read More

  3. Career Planning – A Continual Learning, Acquiring and Strategizing Process

    Apr 25, 17 04:11 AM

    Career planning is not a one time effort, it is a continual and ongoing process that may help an individual throughout his/her life.

    Read More