chulaG6527 chulaG6527
  • 22-04-2024
  • Mathematics
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The lifetime of a lightbulb in a certain application is normally distributed with mean μ = 1400 hours and standard deviation σ = 200 hours.
eight light bulbs are chosen at random. what is the probability that exactly two of themhave lifetimes between 1350 and 1550 hours?

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