A motorbike battery manufacturer found that the life of


A motorbike battery manufacturer found that the life of their batteries is normally distributed with a mean life span of 8700 hours and a standard deviation of 400 hours. If a battery is selected randomly, find the probability that the battery will last more than 9000 hours.

  • 0.773
  • 0.456
  • 0.227
  • 0.201

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Basic Statistics: A motorbike battery manufacturer found that the life of
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