Here are 2 rooms. The 1st room has 3 switches corresponding to 3 bulbs in the 2nd room. How many minimum visits to the 2nd room are required for a person who is in the 1st room to find which switch belongs to which bulb?
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he must visit twice in the in the room.....firstly he must on 2 switches and would watch for which bulb these belongs and pfcourse he would come to know yhat the switch whuch is not on is connected to vmbulb which donot lit.
than he must close one switch out of 2 and would come to the conclusion...as
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