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Q: A, B and C can do a job working alone in 50, 75 and 20 days respectively. They all work together for 4 days, then C quits. How many days will A and B take to finish the rest of the job?
  • A. 20
  • B. 30
  • C. 18
  • D. 24
Correct Answer: Option A -
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Explanations:

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