The Lites-Are-Us company advertises that its average light bulbs last 365 days. They want to include a guarantee that a lightbulb will last between 255 and 475 days. Suppose the distribution of the life expectancy of the light bulbs is normal, with a mean of 365 days and a standard deviation of 55 days. What is the probability of a light bulb lasting between 255 and 475 days? 0.16 0.32 0.75 0.475 0.95