Question

the life expectancy of a typical light bulb is normally distributed with a mean of 2100 hours and a standard deviation of 40 hours. what is the probability that a lightbulb will last between 1965 and 2165 hours?

Answer 1

@vishweshshrimali5

Answer 2

Im thinking D after

Answer 3

Sorry I can't help you much for this. I haven't studied statistics since last 2 years.

Answer 4

But even though let me give it a try.

Answer 5

Ok ;)

Answer 6

Yes D is correct.

Answer 7

Yess thanks