if there are 3 black caps and 2 red caps and there are three person. Who randomly wear these caps . These three persons are standing in a queue. Last person can see the other two persons cap and the second person can see first persons cap and the first person cannot see any ones cap. When last person was asked which colors cap is he wearing then he said he dont know, second person also replied the same thing. But first per replied that he knows what color cap is he wearing. How did he replied.
