Im sure you can test it yourself, i used to remember the infant school science tests. Get a glass of cold water from the fridge, and put a piece of cardboard over it. You should get condensation forming fron the outside of the glass because the water inside is cooler... Now try the same with salt water, if you get condensation then u'll have answered your own question.
The cardboard was only used to show water not escaping from the glass.
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