Mathematics, 05.06.2020 02:57 nommies005
The ABC light bulb company produces a light bulb whose life expectancy is normally distributed with a
mean of 300 days and a standard deviation of 50 days.
a) What is the probability that a randomly selected light bulb will last less than 220 days?
b) What is the probability that a randomly selected light bulb will last between
280 and 340 days?
c) What is the probability that a randomly selected light bulb will last more than 365 days?
d) Based on this data, 10% of the light bulb would last longer than how many days?
(highest 10%)
Answers: 1
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