If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, approximately what percentage of light bulbs has a life of more than 3000 hours?

A. About 84%
B. About 68%
C. About 32%
D. About 16%

Answer B

5 answers

I got .1587, which matches 16% or D

Did you take 1 - ...., since it asked for "above" ?
Disagree. "More than" includes everything below the mean.
Agree.
PsyDag do you agree with Reiny or the answer i have
I misread the Question, so your answer