If you have checked the tablets main settings, as well as the settings in whatever app you are trying to use, and were unable to get the sound to work, I would take it back to where you got it and make them give you one that works.
If you have checked the tablets main settings, as well as the settings in whatever app you are trying to use, and were unable to get the sound to work, I would take it back to where you got it and make them give you one that works.