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MMLU / It takes Kate k days to write a GRE math practice test. It takes John j days to…

Problem

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question

It takes Kate k days to write a GRE math practice test. It takes John j days to write a GRE math practice test. If Kate and John work on a practice test in alternating 2-day shifts, it takes them 10 days when Kate starts and 10.5 days when John starts. How long would it take the two to complete a practice test if Kate and John worked simultaneously?

choices

  1. 9/2 days
  2. 5 days
  3. 41/8 days
  4. 36/7 days

subject

college_mathematics

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