The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours and the mean lifetime of a b

Question

3 years ago

5

ulb is 500 hours. Find the probability of a bulb lasting for between 480 and 526 hours.

1 answer:

FinnZ [79.3K] · Answer 1 · 2022-10-29T19:16:24+03:00

Answer:

The probability of a bulb lasting for between 480 and 526 hours=0.74454

Step-by-step explanation:

We are given that

Standard deviation of the lifetime, $\sigma=20$ hours

Mean, $\mu=500$ hours

We have to find the probability of a bulb lasting for between 480 and 526 hours.

$P(480$

Hence, the probability of a bulb lasting for between 480 and 526 hours=0.74454