Three friends rent a room for Rs.30 by paying Rs.10 each. The owner decides to give them a discount Rs.5 and gives it to the broker. The broker who a cunning man takes Rs.2. and returns one rupee to each of them. So the sum paid by each person would be Rs.9 which adds upto Rs.27 and the broker took Rs.2 ,so the total is Rs.29 where did that Re.1 go?