pohlcat3889 pohlcat3889
  • 16-01-2024
  • Mathematics
contestada

Life expectancy of a typical lightbulb is normally distributed with a mean of 3,000 hours and a standard deviation of 38 hours. What is the probability that a lightbulb will last between 2,975 and 3,050 hours?
a) 0.5565
b) 0.6520
c) 0.3545
d) 0.6250

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