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What is the answer??explain me
ans- BLUE!!!!!!!!!A replies i dont know means B&C both are not wearing red caps,apart from it can be any possibility(BB,RB,BR)B sees blue cap of A so he can't answer,as B is unable to answer so C understand he is wearing blue cap
Since, A and B can see which color of cap C is wearing, C can ask either A or B about his cap's color. Asking from A or B, C answered the correct answer. By asking others this is not possible for both A and B.
What if A & B just don't think logically so therefore don't know. Even if both hats were red, A could be too dumb to realize his must be blue. ;)