medium · GMAT Quant
An automated sorting machine, Model X, processes a standard shipment in 12 minutes, while Model Y processes the same shipment in 15 minutes.
If both machines work simultaneously at their respective constant rates to process a single standard shipment, how many minutes will the operation take?
- 6dfrac23
- 13dfrac12
- 3
- 6dfrac67
- 27
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