A person aboard a ship in the middle of the Atlantic Ocean reaches down and collects exactly one liter of sea water. He then returns the water back to the sea. Suppose that enough time passes that the water he collected becomes equally dispersed throughout all the oceans in the world. At some other location on one of the oceans a person reaches down and collects exactly one liter of seawater. How many molecules of water (H2O) from the first liter collected will likely be present in the second liter? Any suggestions?

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