GRE Problem Solving Question 726

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Source: Magoosh

Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?

  • A 72
  • B 75
  • C 84
  • D 96
  • E 108

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