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MMLU / A publisher used standard boxes for shipping books. The mean weight of books…

Problem

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question

A publisher used standard boxes for shipping books. The mean weight of books packed per box is 25 pounds, with a standard deviation of two pounds. The mean weight of the boxes is one pound, with a standard deviation of 0.15 pounds. The mean weight of the packing material used per box is two pounds, with a standard deviation of 0.25 pounds. What is the standard deviation of the weights of the packed boxes?

choices

  1. 28.000 pounds
  2. 5.290 pounds
  3. 4.085 pounds
  4. 2.021 pounds

subject

high_school_statistics

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