Can someone please help me?
The Normal Distribution (Algebra 2)
LIGHT BULBS: The time that a certain brand of light bulb last before burning out is normally distributed. About 2.5% of the bulbs last longer than 6800 hours and about 16% of the bulbs last longer than 6500 hours. How long does the average bulb last?

Question

Can someone please help me?
The Normal Distribution (Algebra 2)
LIGHT BULBS: The time that a certain brand of light bulb last before burning out is normally distributed. About 2.5% of the bulbs last longer than 6800 hours and about 16% of the bulbs last longer than 6500 hours. How long does the average bulb last?

anonymous · Answer

lol ok thats says that your 2nd standard deviation starts at 6800 and 1st starts at 6500

anonymous · Answer

your mean would be 6200

anonymous · Answer

do you understand why??

anonymous · Answer

@Angel_Kitty12

angel_kitty12 · Answer

@Musicdude 

Really sorry my phone was acting up are you still willing to help me?

anonymous · Answer

yea

angel_kitty12 · Answer

Okay thanks so much and yea I got the mean of 6200 but that can't be the answer is it?

anonymous · Answer

yea it is because the average is the mean

anonymous · Answer

so an average lightbulb would last 6200 hours

anonymous · Answer

cool?

angel_kitty12 · Answer

Wow really..Cause usually it's a whole bunch of other steps...oh wow. God thanks so much :)

anonymous · Answer

no problem