The true length of boards cut at a mill with a listed


The true length of boards cut at a mill with a listed length of 10 feet is normally distributed with a mean of 123 inches and a standard deviation of 1 inch. What proportion of the boards will be less than 124 inches?

  • 0.4623
  • 0.7765
  • 0.8413
  • 0.1491

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